The Science of Time Explained by Brian Greene
HTML-код
- Опубликовано: 25 авг 2024
- Theoretical physicist, mathematician, and string theorist Brian Greene explains the science of time. As a general definition, time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. Brian Greene simplifies the concept of time so we can have a better understanding of it.
In general relativity, the physical nature of time is addressed with respect to events in spacetime. For example: The collision of two particles, the explosion of a supernova, or the arrival of a rocket ship.
Brian Greene also explains if its possible to time travel. One of the most frequent questions people wonder when thinking about time is whether its physically possible to go back in time. But a central problem with time travel to the past is the violation of causality.
As for going back in time, it is in direct violation of causality. Giving rise to the possibility of a temporal paradox. Some interpretations of time travel resolve this by accepting the possibility of travel between branch points, parallel realities, or universes.
#bgreene #sciencetime #timetravel
Subscribe to Science Time: / sciencetime24
Sources: • Brian Greene: Quantum ...
• The Richness of Time
"Brian Greene Visits NASA Goddard" by James Webb Space Telescope is licensed under CC BY 2.0.
Thoughts about time, energy, etc with regard to dimensional analysis is one of my idle guilty pleasures.
A wise old bullfrog said this about time:. "Time is fun when you're having flies".
Time doesn't pass. Time just IS. And we travel through it. Everything that has happened, or will ever happen already has, is, or will happen.
Disagree . We don't travel through , or how do you do this ? Time is not a mist of some kind , time is a measurement of movement , by something physical . Time as an independent " dimension " , from the other three dimensions , length , breadth and deepth and has influence on the physical is wrong . If I change time and not the other three dimensions , I don't change the other three dimensions . If I change one of the three dimensions , exclude one , then I also change time . Hence time is not a real dimension . Because time can not exist independently from the other three and nor can it change the other three , in and of its self .
You mean time is static. I would say yes and it has nothing to do with entropy. Time does not flow because if we had time flowing we would see or could detect the movement of it.
@user-ky5dy5hl4d Entropy, by definition, has a causational direction. Entropy doesn't happen all at once, either.
@@philharmer198That's been what I've come to understand what time is. It's just a way to measure entropy on a consistent basis. Guess we won't know until we can travel near, at or above the speed of light, send a craft out and see what, if any time dilation is observed. IMHO.
@@user-ky5dy5hl4dI'd think the only way to observe your thought would be to be outside of time in order to observe any flow. IMHO.
Time is so cool. Travel to the future by going at relativistic speed or at the bottom of a huge gravity well. Meet your descendants.
Travel to the past could be possible by parallel universes; and/or each past visit could create a new universe, thereby handily avoiding paradox. What is time inside a black hole? Could it be the way to the past? This stuff is so fun to think about.
Blackholes bend and warp spacetime the closer or farther you are from them, to essentially go forward as you say you must reach light speed and then return to your starting point, but to go back I theorise you must get at the outer edge of a black hole at light speed such as to bend and warp space so as you leave the outer limits of the black hole and return to your starting point you won't have gone forward you will have gone backward, not to a predermined point but a random one
??????
The New Yorker nailed it in a cartoon. "Time is what keeps everything from happening at once."
More accurately “Time is what’s fcuking my body”.
3:20, That’s what he said. You repeated the video.
Actually, that’s an old Mark Twain quote.
Time doesn't exist. It's just an illusion caused by the unfolding of the physical universe.
No.Sun exposure and an unhealthy diet is what is f-ing up your body.
Thank you Professor Brian Greene for affirming the narrow corridor of knowledge that we have and are continuously buffled about its infinity.
Einstein = exterminated in 1990 at University of Michigan, Nuclear engineering department.
E = mc², special relativity theory and general relativity theory were debunked not has been and never was any science. Furthermore, western civilization 500 years of physics and astronomer were debunked not has been and never was any science.
**Western civilization 5 centuries of physics = observational errors came about from Earth’s rotation that alters the observer visual from a line of sight visual to a wave of sight visual.
5 centuries of physics and astronomy data can be produced from this figure (wave/circle)
as altered visual of the observer. Meaning
The 5 centuries of claims of physical sciences laws are expressions of visual effects and not reality sciences.
The solar system = visual effects
Einstein = solar system error
The solar system error is expressed by Newton’s universal gravity equation
F = G m M/r²
This equation can produce all Einstein’s E = mc², special relativity theory and general relativity theory **physics.
Isaac Newton’s Universal Gravity Equation F = G m M/ r2 solution in real numbers system or Time Independent Domain = Solution A = Particle Motion = **Classical physics**
And r₀ = a (1 - ε2) / (1 + ε cosine θ)
Isaac Newton’s Universal Gravity Equation F = G m M/ r2 solution in complex numbers system or Time dependent Domain = Solution B = Wave Motion = Wave Physics = **Quantum physics**
And r = r₀ e i ω t = [a (1 - ε2) / (1 + ε cosine θ)] e i ω t
And the equations of r = r₀ e i ω t produces length contraction (r - r₀)
And θʹ = θʹ₀ e- 2 i ω t
And θʹ = θʹ₀ e- 2 i ω t produces T = Tʹ₀ e+ 2 i ω t
(T - Tʹ₀) = time dilation
And θʹ = θʹ₀ e- 2 i ω t produces (θʹ - θʹ₀) = Pression
In arc seconds per century (θʹ x - θʹ₀) T
= - 720 x 3600 x (36525.6/T) [√ (1- ε2)/ (1- ε) 2] sine2 ω t
For planet Mercury T = 88 days
Elliptic eccentricity of planet Mercury ε = 0.256
And ω t = arc tan (v/c); v = 48x103 m/sec; c =3x108 m/sec
Visual axial rotation at perihelion in arc seconds per century for planet Mercury’s perihelion is:
And (θʹ x - θʹ₀) T in arc second per century for Mercury is
= - 720 x 3600 x (36525.6/T) [√ (1- ε2)/ (1- ε) 2] sine2 ω t
= - 720 x 3600 x (36525.6/88) [√ (1- 0.2562)/ (1- 0.356) 2] sine2 ω t
T = 88 days; ω t = arc tan (v/c); v = 48x103 m/sec; c =3x108 m/sec
= 43 arc second per century
Is: ψ = [2 arc tan (v/c)] sine [2 arc tan (v/c)]
With (v/c)
Examining time in the science fiction sense is uniform and solid. Everything is measurable and pliable. Time in reality is a human concept of measurement and a coordinate. Time in general is the rate of entropy in relation to another object, it's location and its entropy rate. I don't think of time as a highway it's not linear nor uniform. It's completely relative
time is linear but relative when near an object of significant mass to manipulate it. Time is the beginning of the universe, our present, and the future all at once, yet it is both linear and relative and the human concept of time is but a measurement of the duration of our existence in the universe as well our knowledge of the duration of its existence.
No. A reality. We are living on + not - on our living area.
@@ryanh9691 Yes. Linear but with brake : Mass itself.
Dark Matter help matter to sustain in the line, so less non-linear but more linear. It's why space increases, expansion. I shared this with Nasa..... The space requests time to exist or it's too fast near c.
The truth, space is nothing without time but time comes from space, gravity. It's complicated so if you take Space alone it's infinity everywhere.
Time is like a break :)
@@ryanh9691 I mean T = V. So a brake.
Wrong
Time is what keeps everything from happening all at once.
No it doesn't . Think about it . At this moment everything is happening at once . Everything . From deepest of of space to here on our Planet . Though out our Universe , everything is actually happening at once .
What keeps everything from happening at once , is the Nature of everything . Not time . Time in and of itself can not effect , affect nor cause anything to to move . Because without the physical objects themselves , time would not exist . Time is the measurement of movement . Movement then is the essence of time . Time is not the essence of movement .
That's what I.S. happening ~ ALL AT 10NCE. FROM 0 TO 1 TO 0.
010 dimension universe.
Always informative. I know so little, and I'm grateful for whatever enlightenment I can get.
I once again am thanking this channel for so much great content - Bored man sitting on a bus
Well, at least you're not wasting your time 😑
Time is the measurement of all events 💫
time is the measurement of change
@@allstarwatt7246 is it possible to create change without time?
???????
Very insightful, such a great video!
Time is measured "change". If there is no change, there is no time. The direction of time is the order of change. The rate of time is a measurement done by a uniformly, cyclically changing subpart of the universe (which we call clocks) of the changes in any other subparts (cyclic or not) of the universe. If there is no cyclically changing subpart then we cannot measure the rate of time as we cannot have clocks.
"Time is an illusion. Lunchtime doubly so" -- Douglas Adams (The Hitchhiker's Guide to the Galaxy)
I would humbly offer this: Time is measured relative to standard increments which depend on physical processes that can change due to background effects.
"Back in time" in spacetime usually means seeing light from the past, but there is no way of physically interacting. So, a photograph would be equivalent.
But if you could catalog particle states and then recreate those, you would have essentially gone back in time. Or at least the parts you cared about would have.
Time is the interval between events. No matter, no events. No matter, no time.
Time is nature’s way of preventing everything from happening at once.
Are you telling me time travel is possible but is limited by our technology and basic biology, holy hell that’s mind bending. It seems useless but the knowledge alone
Einstein = exterminated in 1990 at University of Michigan, Nuclear engineering department.
E = mc², special relativity theory and general relativity theory were debunked not has been and never was any science. Furthermore, western civilization 500 years of physics and astronomer were debunked not has been and never was any science.
**Western civilization 5 centuries of physics = observational errors came about from Earth’s rotation that alters the observer visual from a line of sight visual to a wave of sight visual.
5 centuries of physics and astronomy data can be produced from this figure (wave/circle)
as altered visual of the observer. Meaning
The 5 centuries of claims of physical sciences laws are expressions of visual effects and not reality sciences.
The solar system = visual effects
Einstein = solar system error
The solar system error is expressed by Newton’s universal gravity equation
F = G m M/r²
This equation can produce all Einstein’s E = mc², special relativity theory and general relativity theory **physics.
Isaac Newton’s Universal Gravity Equation F = G m M/ r2 solution in real numbers system or Time Independent Domain = Solution A = Particle Motion = **Classical physics**
And r₀ = a (1 - ε2) / (1 + ε cosine θ)
Isaac Newton’s Universal Gravity Equation F = G m M/ r2 solution in complex numbers system or Time dependent Domain = Solution B = Wave Motion = Wave Physics = **Quantum physics**
And r = r₀ e i ω t = [a (1 - ε2) / (1 + ε cosine θ)] e i ω t
And the equations of r = r₀ e i ω t produces length contraction (r - r₀)
And θʹ = θʹ₀ e- 2 i ω t
And θʹ = θʹ₀ e- 2 i ω t produces T = Tʹ₀ e+ 2 i ω t
(T - Tʹ₀) = time dilation
And θʹ = θʹ₀ e- 2 i ω t produces (θʹ - θʹ₀) = Pression
In arc seconds per century (θʹ x - θʹ₀) T
= - 720 x 3600 x (36525.6/T) [√ (1- ε2)/ (1- ε) 2] sine2 ω t
For planet Mercury T = 88 days
Elliptic eccentricity of planet Mercury ε = 0.256
And ω t = arc tan (v/c); v = 48x103 m/sec; c =3x108 m/sec
Visual axial rotation at perihelion in arc seconds per century for planet Mercury’s perihelion is:
And (θʹ x - θʹ₀) T in arc second per century for Mercury is
= - 720 x 3600 x (36525.6/T) [√ (1- ε2)/ (1- ε) 2] sine2 ω t
= - 720 x 3600 x (36525.6/88) [√ (1- 0.2562)/ (1- 0.356) 2] sine2 ω t
T = 88 days; ω t = arc tan (v/c); v = 48x103 m/sec; c =3x108 m/sec
= 43 arc second per century
Is: ψ = [2 arc tan (v/c)] sine [2 arc tan (v/c)]
With (v/c)
Maybe there is no causality effect. Maybe everything that has happened and everything that will happen, has already happened(in a sense everything happens at once and nature just plays it out to make sure it doesn't all happen at once). Therefore if anyone travels back or forward in time, it was supposed to happen, because it already did, therefore not effecting anything.
Great insight! What if the timeless 'now' (present moment) is all there ever is? What if thinking (thoughts) and time are one? What if past (memory) and future (projected memory) are just in your brain?
So like avengers endgame
The most concise definition of time I could come up with is.........Time = relative duration.
I have a strong suspicion that time is non existent. It is perhaps just a human invention to differentiate one state of matter or event, from another.
Without thought (thinking), will there be a 'time'? Are thinking and time (memory of the past and expectation for the future) one and the same? Observe sir!
@@badjonatan Without thought, will there be time? You said 'yes'. Please elaborate. Maybe what you think as time is the now (present moment) and we can say that the now is not time. Psychological time and the now (present moment) are not the same. The time is movement whereas the present moment (now) is not moving at all. All that your senses perceive are all movements and therefore they have an element of 'time'. Your brain is the one that records time because it evolves thru time. That's why so many scientists were so baffled with this concept of time. What I'm saying will not be understood even with brilliant minds because our mind is the product of time and therefore it cannot understand the timeless. The moment we 'think', time arises because thinking is movement. Can time understand time? It's impossible.
@@donotbegullible You have copy pasted content from the book The Power of Now
@@vips078 sorry but I didn't sir🙏 I don't need any books or anybody to know the Truth. The truth is within every one of us. If you 'think' I got it from books or anybody else, it's fine. The moment you make an 'opinion' about somebody, you're just strengthening the ego within you so it's your problem not mine. I'm not here to impress anybody. I'm here just to talk about the Truth about time. Whether you reject or accept it, it doesn't matter to me because an open mind should not reject or accept anything. One should investigate with an open mind to know the truth whether spiritually or scientifically. Remember this: Truth doesn't need science but science needs the Truth.
@Jinx How would you know?
I like the idea that the gravity is created by time "pushing" us to the future .
mass creates gravity creates entropic shift
Gotta go SOMEWHERE...
Space/time/gravity are the same
Space-time is called upon by matter; which in turn is able to warp it to produce gravity and entropy in order to lock time into a forward flow. Time is frozen within a singularity, and only released when the singularity explodes in all 3 dimensions. Without matter in any of its forms, there would be no need for space time.
The arrow of time points forward in time because of the wave function collapse. Because causality has a speed limit every point in space sees itself as the closest to the present moment. When we look out into the universe, we see the past which is made of particles. When we try to look at smaller and smaller sizes and distances, we are actually looking closer and closer to the present moment. The wave property of particles appears when we start looking into the future of that particle. It is a probability wave because the future is probabilistic. Wave function collapse happens when we bring a particle into the present/past.
Do you think we'll discover what happens inside a black hole in the next 20y? Can the LHC give us a hint with more power provided?
The solution to live forever is to travel to the speed of light. So if you “go to the light” and you transform in light you will live forever because time won’t happen to you
Thanks , Prof. Brian Greene for explaining TIME. I am from Biophysics branch. I don't have any right to comment but still I suggest you to go through VEDAS . Vedas have their own theory of the creation of this Universe as well as Time . Don't know but you may find some answers . In Vedas and Hindu Philosophy , TIME is energy and there is no past , present and future . It is immortal .
You are requested to go through the Vaidic philosophy .
I just had a thought. one of fav comedoes Back to the future! One of theckey moment for me: when Marty is playing CHUCK BERRY : Johnny B. Goode, and one guy is calling Chuck Bery and let listem him to the song!
What about backwards or vice versa causality with a quantum entanglement?
Thank you agin for this great lecture! still my fav!
you can travel in a box with no windows 60mph and not know your moving but if you slow down and fall behind that box then you experience time in the form of distance between you and the moving box time does not exist for us like it doesn't for a photon. we only experience it when we are moving relative to it. time is only a perception of relative distance.
I don’t really get the question of “what is time actually?” At some point, in all scientific observations, we hit a similar wall, such as “what is an atom? A quark? Energy? What is the fabric of space?” We live in a 4 dimensional spacetime, one cannot exist without the other, in our universe at least. There are many questions about the universe we’ll never answer while living inside of it, and a comprehensive description of time is one of them.
Additionally, our ability to measure time has nothing to do with understanding it, time simply moves at a near constant rate on the surface of Earth, and we just happened to observe the resonance of a cesium atom that allowed us to create precise timekeeping devices.
Time and Space are “Forms of Perception” according it Immanuel Kant in his brilliant discussion in his “Critique of Pure Reason”.
Time is not irreversible. Some events require enough energy to make it seem irreversible, like a coffee cup breaking apart. However, entropy does provide a direction to time, Time's Arrow.
You are going back in time if you went to Colonial Williamsburg and everything was as it was historically.
If something was perfectly stable, such as absolute zero temperature matter, how would time pass for it? If something was completely unstable, how would time pass for it? Is time passage concerned with stability? Varying degrees of stability? Also, what lies beyond physical stability? Would it be beyond time?
I love every single Brian Greene book. Where are these clips taken from? His lectures?
Yes, and Joe Rogan podcasts
?????
Hi! These clips were taken from his podcast with Lex Fridman, about halfway through the podcast the discussion turns to time. As I was listening to this video I thought to myself "jeez this sounds so familiar, where have I heard Brian Greene talk about this before?" But these are from the Lex Fridman Podcast that he was on a few years ago.
our time is amount of cycles of clock. Clocks can tick with different speed
Time can be explained as a process of energy exchange formed by photon electron interactions. We have photon ∆E=hf electron couplings continuously transforming potential energy into the kinetic Eₖ=½mv² energy of matter, in the form of electrons as an uncertainty ∆×∆pᵪ≥h/4π probabilistic future comes into existence. All it takes for this to be logical is for the spontaneous absorption and emission of light waves to precedes absolutely everything that happens in our three-dimensional world.
Time is a quality of the atoms. It is the different vibration of the atoms when they are accelerating
Time = State of existence == momentum operator of the Schrodinger equation/movement of the wave function.
Why does time always go "forward" question is similar to asking why does mirror flip left and right but does not flip top and bottom? And the answer has to do with how we define "forward". The forward direction by definition is the order of "before" the configuration of the universe which, by its current state and the dynamical laws of physics is forced to go to the after configuration of the universe. For example, if a particle is currently at origin and moving on the X axis to the right at a constant velocity (think of this as a "before" configuration) and no other force is acting on it, and if the newton's 2nd law holds, then the only possible next or "after" configuration of the universe will be the particle is slightly to the right of the origin. We will not expect it to be on the left of the origin. And that relative order of the two configurations of the universe is what we call or define as the "forward" direction. So there is no mystery here. To reverse time, extra work will have to be done. I do not think we have to appeal to low entropy to high entropy laws to account for the direction of time. The analogy of a film running backward to discuss backward flowing time is also incorrect. The film moves backward in space in front of the projector head but it still moves forward in time. IMO reverse direction of time is a meaningless concept. Of course, it is possible that I am wrong about this.
I was just thinking about this subject so this video is certainly timely
I feel that time is the base of everything. If there was no time, there would be nothing”. Neither vaccum nor solid! We cannot imagine “nothing” but thats what there will be.
Time is the equal and opposite of Light. Light is momentum. Time is anti momentum. Experientially, we travel backwards in light, forwards in time. Gravity is conventionally thought of as acceleration because it seems like a falling object is being pulled. In actuality it’s being decelerated. “Gravity” is Time. The measurement of Time is counting “still” points.
"Elusive, fluid and dynamic" That's the modern standard for definitions to terms such as 'time'.
Maybe that's why we don't see any interstellar travelers traveling at or near the speed of light within the galaxy. Even though the trip for them is relative to them say 6 months but for us they been traveling for 500 thousand years and who knows when they will get here?🤷♂️ Trippy stuff man
Ι love the series!
I think it is important to say that even time travel to the future, is theoretically possible, you can never get back on earth at the time you left it . On the other hand it is impossible to travel to the past, because it would require an infinite amount of energy to be able to reverse enthropy, to go back. At least in my way of thinking.
We dont knoe what entropy is very much either in existential way, except for some definitions taliing about the addition of information, and that for us, and our consciousness, it increases because we add information, so increase of info means we know more so more entropy, but there may be universes whete entropy decreases.
With scholars pondering the nature of time for thousands of years it’s more likely we aren’t smart enough to understand the nature of time. It may turn out to be a simple force but it’s eluded our best and brightest.
Time (quantum field mechanics?) is moving universe into future, as expansion of space moves into past, with the speed of light being the present?
i've read and watched everything about Albert Einstein, and You, are my favorite scientists of all time, no pun intended lol. I like to think of time as human perception of our own existence.
Time is; movement of the wave function. Pick an operator, there is perhaps one that I’m referring to which I do not have yet, but it’s at its most fundamental, movement of the wave function.
Brian Green is very well spoken.
The essence of time is movement . Without movement there is no time . The essence of movement is the physical . So without the physical there is no movement , therefore NO time . In the cesium atomic clock the electron movement is from one position to another and back .
I wonder if you consider space-time as physical because space-time is expanding and the universe is getting older.
@@martello44
No and here's why . Space doesn't expand . The volume of space , hasn't changed and time is irrelevant . And as well 32% of galaxies are blue shifted meaning they are coming towards us . ( Interesting isn't it ) . Meaning that not every galaxy is expanding moving away from us .
@@philharmer198 I’m not an expert in this field but most astronomers say that space-time is expanding. You can always disagree but I simplify space-time and galaxies as logs in a flowing river. The river flows in one direction and it’s very likely that some logs move closer to one another (blueshifted) but they are still being carried by the flowing river Which represents the fabric of space time.
There was no mention of Loop Quantum Gravity for which time is not a factor in its initial equations. Time is not fundamental to it. Rather it is emergent from changes in phenomena. I can imagine change without time but not time without change.
And time can be replaced with physical properties in equations.
We can substitute degrees of earth’s rotation, for example.
The formula for calculating the speed of an object is - Distance/Time = Speed -> D/T = S
So, if D = 60 miles and T = 1 hr then S = 60 mph 60/1 = 60 mph
69 miles = 1 degree of the earth’s circumference at the equator. And 60 miles = 0.87 degrees.
15 degrees of earth’s rotation = 1 hr - So, 0.87/1 hr = 0.87 degrees per hr which = 60 mph
Substituting those physical properties with notations of time provides a much cleaner equation.
Thanks for your precious time.
One thing I’m absolutely certain is nothing in the universe knows what time is.
Time is an arbitrary regular count, used by living organisms to synchronize processes and activities. This count exists in the simplest of single celled organisms and is coded into the DNA molecule. Time is a mystery to physicists, but not a mystery to biologists. Different organisms count at different rates. Time is relative to the organism. Einstein showed that time is relative, although it was already obvious to any parent of a two year old child, anyone waiting for a bus, trying to catch a fly or struggling in a life or death situation. Because time is only useful to living organisms, and living organisms take up a very small proportion of the universe, time is not fundamental to the workings of the universe. Time is a tool and therefore it is something that does not exist independently. Time appears to move forward because the arbitrary regular count is only useful when it moves in one direction. A count from 1, 2, 3 or 3,2, 1 are equally useful but a count of 1,3,2 is not useful at all. Clocks measure movement or change, not time. A good clock is one that agrees with another clock. Your watch is good when it shows midday and the sun is directly above you. Clocks can be mechanical, chemical, atomic or biological. Clocks are influenced by motion, temperature, pressure, gravity and probably other things, therefore two ‘identical’ clocks in different environments will count differently. This does not mean that time changes. Relative time, means the future, present and the past are also relative to the organism. The past is held in present memory, the future is supposition extrapolated from remembered experience, and the present has already past. So because time is relative, time travel is not possible and the time paradox does not exist. Location is also relative, the three dimensions of space are relative to another location in space . There is no absolute starting point to measure from. Because time and space are both relative there is no absolute beginning and no absolute end, only the organism’s relative beginning and the organism’s relative end. Therefore there is no need for a god nor a big bang to create a beginning. There is only movement and change which organisms make sense of by using the tools of three dimensional space and one dimensional time.
For example the internet article - Keeping track of time: The fundamentals of cellular clocks - PMC (nih.gov)
It is something we will never comprehend or understand until humans evlove to a higher plane but sadly we as,a,species will destroy ourselves before that happens
Is time the expansion of the universe?
Good summary of the issues. I think you alluded to the importance of change, and is that not really the important factor? Change. Change is inherent in the quantum nature of the building block of our universe. I agree with the greek philosophers who said that time is a concept, a way to grapple with change and to let us understand change. I guess Einstein's concept of spacetime assigns a more substantive role to time, but rather than saying time is relative to speed, can we not as well say that change is relative to speed?
Curious to see people's theories and opinions on this. How do you suppose "time" would act and be naturally if there was no one conscious to observe it? Take into consideration time being relative when responding.
There is no past and there is no future. There is only present. It is not the past events that influence you, it is the present that creates past events. At this very moment, a potential future event materializes and becomes the past event. Present is the only real thing. It is simple as that. Therefore, 'time travel' has no place. It never had and it will never be possible. The only impact on future events you have is by acting now, at present. This brings a pool of potential future events closer to your desired outcome. The conclusion - act now, at present, to create the past (events) and act now, at present, to influence the future (potential events). Stay safe.
You are giving us too much credit. What we think of time doesn't matter at all. We are the size of molecules on grains of sand on every beach in the world... relatively. We are evolutionary infants.
Time per se does not exist. What we call time is simply the measure of the speed of change.
In a way I feel like gravity and space time is the answer to time travel but Im not sure how because it’s not fully understood
The probability of time is itself a probability of cause of time. In such manner time itself is a illusion of disguise of probable circumstances. And in that notion time is nothing but a mere ludo player.
"Time is nature's way of ensuring
that everything doesn't happen all at once."
- John Wheeler, Physicist
Brilliant!! Surely it is.
,,,,,,
But I think,,, something the most important is missed or omitted in this definition.
It should be,,,,
"Time is nature's way of ensuring
that everything doesn't happen all at once
to 'an existence' or 'a being'."
Also, quantum mechanics show us that TIME indeed does not exist. There is no such thing as past/future. These things are products of human imagination. Sadly, what we call "science" is often theories or concepts that scientists themselves admit as wrong. So who's to say that our current fantasy of time is actually right?
Time is fascinating. I worked the subway stations for nearly 10 years. From one end of the city to the other. Every so often I would notice the city would be saying that, "Today just flew by" or "The day was just dragging along." How can an entire city complain about the same time paradox unless it was effected by it. Maybe a time distorted bubble the earth passes through in its revolution around the sun. Maybe random waves of time distortion hitting the earth? Maybe they're randomly given off by the sun. Maybe they're from outside our Terran system and reach us in intervals. ???? Ti-i-i-ime, is on my side. Yes, it is!
Without thought (thinking), will there be a 'time'? Are thinking and time (memory of the past and expectation for the future) one and the same? Observe sir!
@@donotbegullible Pop always says, "There's only one thing faster than light, thought."
I've always liked that saying.
@@michaelccopelandsr7120 the faster it comes in consciousness, the faster it goes in consciousness. It travels in CONSCIOUSNESS (timeless) all the time.
@@michaelccopelandsr7120 or, how about "feeling"? Like, when you find out something and you're instantly angry. Or you realize how much you love someone and it hits you.
Hmm here's another question... Is love An energy that can reach across the galaxy? If my wife and I love each other, and one of us leaves in the spaceship, can't we still love each other even though we're far away? Is it just a construct within our individual minds?
@@kbanghart my Pop always said, "There's only one thing faster than the speed of light... Thought." With how little we still know, anything is possible.
The narrator states "...he see's causality emerge at the macroscopic level but not at a fundamental level"
Thing is causality is a product of interactions and the 4 fundamental forces of nature are responsible for every interaction in the universe. The definition given in this video i.e. "..the continued sequence of existence and events...." is actually talking about the progress of events which is causality. This sense of time passing that we experience is an illusion that was created by the harnessing Earth's rotations for tracking the day and year, because what was quite simply the passing of the day and year prior to developing this system for tracking these events, now with time units in conjunction with these events became "time passing"
Time is made of events that cause everything.
but imagine if there are no events, like in frozen mountain and no one is measuring time, would you really go in to the future and if yes on what basis would you even know that you went to the future and what would be different from past
Time is not a dimension but a static entity where entropy is a displacement of matter. Time does not flow and has no direction. And we don't have a definition of time.
Time is decay , nothing ever un-decays, entropy, 2nd law. Everything into chaos.
Time is a concept. It is not a place you can travel to.
When events happened in "the past" they happened in what was then "the present."
When events happen in "the future" they will happen in what will then be "the present."
The present is the only reality, and even that is difficult to define.
Is time only linear with directions forward and backward or might there be additional "timelike" dimensions, inaccessible to us except, perhaps, through gravitational interactions? Is there an elasticity to time that could, in some way, limit the extent of relitavistic time dilation variance within causally connected regions of space? What happens to time in a black hole? Can time/ entropy growth reverse - either in a black hole or in a relative sense once two previously causally connected regions of space become disconnected with expansion of space? What does the finite speed of light tell us about the clock speed of the universe - and would we even be aware if the speed of light changed if there was a corresponding change in the "speed" of causality?
Thank you
What if time didn’t exist? Could we exist? How would we exist without time?
Great questions🙏 What if thinking (thoughts) is time? What if time seems to exist because thinking sustains it to exist? What if thinking and time are just in your brain?
I don't think time is more difficult to explain that the other 3 dimensions of out physical world; for instance is time really harder to explain than "up" ?
Humans can not define "time". We can talk about relative time as related to physics, but, is there an absolute time that is the same for the universe? We have more questions than understanding.
have long contemplated the dissipation associated with efficiency of energy consumption. Waste heat being the difference between energy input and the work performed. Murphy is paywalled. I'd like to check his maths
Time is movement, though space! Yeah, and we all do that. On our own time.
There is a ‘Present’ that is everywhere at once. Right now it is the Present. But if I wait a few seconds it is still the Present. And if I wait a Thousand Years, it’s still the Present. What divides the Past & Present yet retains so interconnected?
Once upon a time I’ll pass on the next
For as soon as I am here I’ve left.
However this is just how you perceive.
For I never change and yet still continue to weave.
where is this citation coming from?
@@peterporter5742 There is no citation. But Tennessee Williams was certainly my inspiration. I am reminded of that old poem from long ago:
“Has it ever struck you that life is all memory, except for the one present moment that goes by you so quick you hardly catch it going?”
Tennessee Williams
@@peterporter5742 If time measures Events, then history records time Eventually. I suppose it then goes deeper from a Catholic understanding of the Trinity. Yet it is odd that many of my fellow Catholics do not understand The Holy Trinity is our central mystery. John Wheeler once said time is nature’s way of ensuring that everything does not happen at once. And this is so strangely accurate. In some sense there is God the Father (past), God the Son (present), God the Holy Spirit (future).
We have One God in Three Persons. But then the perception of time goes deeper. There is a ‘Present’ that is everywhere at once. Right now it is the Present. But if I wait a few seconds it is still the Present. And if I wait a Thousand Years, it’s still the Present. What divides the Past & Present yet retains so interconnected?
Once upon a time I’ll pass on to the next
For as soon as I am here I’ve left.
However this is merely how you perceive.
For I never really change and yet still continue to weave.
I am reminded of that old poem from long ago:
“Has it ever struck you that life is all memory, except for the one present moment that goes by you so quick you hardly catch it going?” -- Tennessee Williams
As Jordan Baker noted, Augustine thinks that a particular concept of time-“deictic” time-metaphysically (not just epistemically) depends on minds. That term, deictic, comes from linguistics and is used to describe words that mean the same thing but refer to different things depending on their context. For example, here, now, and I are all deictic words. They each have the same meaning no matter who speaks them, but they pick out different things depending on who speaks.
Deictic time is the supposedly objective now that we all experience from within our own independent contexts, and Augustine connects this idea to a certain notion of change. For Augustine, deictic time is “flowing time.” Whereas eternity “abides,” temporal deictic time passes through past, present, and future; it passes out of being. Augustine claims, then, that there is one objectively existing time, the present, and that the other “times” are just shorthand for operations the mind performs on that fleeting present.
As he states...
It is manifest and clear that there are neither times future nor times past . . . perhaps it might be said rightly that there are three times: a present of things past; a present of things present; and a time present of things future. For these three do coexist somehow in the soul, for otherwise I could not see them.
I suppose it's how you see it because it is indeed a paradox, a cheerful shortcut through logic. Some have suggested the sky is dark because our universe is confined within a huge black-hole. But we can still shine like stars BRIGHTLY within the singularity for others to paradoxically see through the absolute darkness of a gaussian electromagnetic field which linked all the frequencies -- a liquid-light show broadcast along all spectrums at Absolute Zero -273.15 degrees Celsius showing social behavior.
God defines time. Time does not define God.
We live in a black hole, and the singularity isn't a place in space, but a place in the future, and we are flowing into it.
Time is a concept we created. And now its something magical 🤣 there is only on time and it is the now. Past, present and the future as we call it is happening now.
Time is not a "concept" that "we" created. Time exists, and has always existed. Everything that exists, or that has ever existed, needed a "place in time" in order to come into existence.
What we did indeed create though is the **quantification** and the **measurement** of time.
When it comes to space/time; time is just a measurement in how far you travel in space.
My idea so I get to name it! Voyager 1 is now in interstellar time! (Mikey's Time) Think of it like Alvin and the chipmunks. "Vyger's" message is fine. It's just sped up now that it's outside our suns time bubble or "Terran Time." It would be faster still if "Vyger" sent a message from beyond the Milky Way's time bubble. That name is still up for grabs. Outside the Local Group time is open, too. Now that "Vyger" is in interstellar space, it's also in the Milky Way's STANDARD, faster moving, interstellar time or "Mikey's Time."
•Our sun's time bubble: "Terran Time" we know and have measured.
•Milky Way's time bubble or "Mikey's Time." The rate/flow of TIME outside any influence but within the Milky Way: We just got there and are still figuring. Wild guess I'd say time will increase in speed, now and until Vyger is outside the Ort cloud .007-.07% faster, maybe. Just for reference.
•Local Group's time bubble or the rate/flow of time outside of any influence but within the Local Group: Name still open and unknown. Wild guess .08% to a couple seconds faster, maybe. Used just for reference.
•Outside any influence in the, "True Interstellar Time Standard." Name up for grabs and just begging to be measured. Surfing time here is SO choice though it's best to have your motor boat. ;-P
A minute is a minute in all. It's the rate/flow I'm talking about.
Pass it on, please and thank you.
I hope Time travel or Multiverse theories become true in difficulty situations in case end of world comes.
?????????
"Clocks are made by men. Only God creates time."- Rod Serling, "The Twilight Zone," 1960. Even as a non-believer, I find that sufficiently explanatory...
Not one mention of entropy? That's somewhat surprising. Wheeler's quote is absolutely wonderful and captures one characteristic of Time. But if we look at a photon traveling billions of years through empty space, everything in the lifetime of that photon actually DOES happen at once, because, traveling at the speed of light means the photon's internal clock moves at a rate of zero. Much of the conundrum of Time can be solved by accepting that Time is a fourth spatial dimension. Now, the usual argument is that the Inverse Square Law (ISL) prohibits that because gravity and light would diminish by the inverse cube if time was a spatial dimension. However, the subject of such ISL arguments is either a graviton or a photon which does not travel through this dimension as we see from everything happening at once for the photon (and the graviton presumably also moves at c). Therefore, the ISL is measured as expected for 3 dimensions, since no time passes for those particles and there is a fixed relationship between Space and Time, those particles traveling at c, do not pass through the 4th spatial dimension at all and would not display dispersion at an inverse cube rate . For this to work, Time has to be a dynamic field as opposed to a static field of the other 3 dimensions. That isn't a problem if we examine the causality and hierarchy of the dimensions themselves (but that's another story in itself). But what about sound, you may ask? The ISL holds for sound because the source, the medium, and the receiver are all moving through time at the same rate, traveling together as it were. It would be the same reason that sound inside of an airplane isn't distorted by the speed of the airplane. Accepting Time as a 4th spatial dimension can free up a much better analysis of the topology of the Universe and as Rocky Kolb says, in cosmology "topology is everything".
If it's Dec. 7th, 1941 here in Casablanca, what time is it in New York.?"
"I don't know, boss. My watch stopped."
This causality thing from time: one event could happen from another event from another split instance of universe (think of double slit experiment).
Consciousness creates time. Otherwise, it wouldn’t exist.
Let me summarize this video: scientists don’t know the difference between time and their belly button lint but they’re trying real hard and failing harder
Are there any serious religions based on Time?
Maybe Brian should start one.
I don't think Brian would be stupid enough to create a religion.
@@allstarwatt7246 maybe “greedy” would be a better word than “stupid” in this context,
I missed the part where he explained what time is
Quite a decent thought provoking article. Dx
Time is what makes it difficult for us to comprehend the actual source of existence, can anyone tell me when 1+1=2 came into existence?
interestingly they experience no time, & no matter hard you try to put them in it, they will never fit.
Time is the Necessary source for all things in existence.
???????????
Our understanding of time is only believed because it benefits our survival. The truth is time doesn't exist. Consider this -- future time doesn't exist because it's always in future. Past time doesn't exist because it's always in past. Current time doesn't exist because there is no definitive now and If there is no definitive now then it means there was never a definitive beginning and will never be a definitive end! There was always something and will never be nothing. Now we have also made another error with something that doesn't exist and it's what has caused so much confusion and mystery surrounding our universe. Particularly the question of how can something come from nothing and how can something become nothing? It can't which means there is no such thing as the number zero! Nothing exists before the number 1 which means there was always something and will never be nothing! So time and zero don't exist!
Honest question…why was cesium atom used and not another? Forgive my ignorance.
So, what if you program the ship to go outside the gravitation field and set it for the time/space that would equal 1 million years, to the day, in the future, and your ship never comes back to the 'present' because the Earth is irradiated by then (from nuclear war)? Then, those in the present never learn how their behavior resulted in their own self-annihilation because you never returned. Therefore, nothing can be corrected to prevent the our future annihilation other than our own inner evolution.
I'm 9, upside down, inside out, and one minute ahead of time. d 6 I M M I 6 + 1 minute 'time theory' How do you suppose THE MOLE, THE DIRECTOR OF MI6, is able to fold space and time back upon itself up to one minute out? Marple Police has confessed with body cam, 'Can I confirm with you, that for Me to know what I know in this context, there would have to be a MOLE' He responded, 'Yes I can confirm that' 'Overt ops' Your thoughts?
Do quantum events occur within Block spacetime? The Schrodinger equation uses a time parameter, does it not?
I think time is only thing that create dimensional difference between two or more universes acting as barrier between them .
Would it be fair to say that time will cease to exist when there are no longer beings in the universe capable of measuring it?
No, because we don't even know if time exists
The earth will still be there, all the stars and planets will still be there - new life forms will replace us and maybe over time one of them will be like us and start to wonder
@@ramaraksha01 well, our concept of time exists for us, within our frame of reference.
Like, does a tree make a sound if it falls in a forest and no one is around to hear it? Well, we can assume that any animals within earshot would hear it. Or if not, then the sound waves would still be created and propagate through the air, right? If not, why not?
@@kbanghart The OP by Julie seems a bit arrogant to me
We have been in this world for barely a few million years, the earth has been around for far much longer, the universe even longer
Time did exist for Dinosaurs & the like when we humans did not exist
Would time exist without motion? (change of location of matter)
If the earth didn’t spin, or revolve around the sun, and our solar system was stationary in the galaxy, the contents of galaxies (planets, meteors, comets, stars) not moving in the universe, etc.
What If the universe weren’t expanding from the Big Bang?
Would time be relevant?
Time is just a property of motion/change.
If nothing moved or changed, time wouldn’t exist, would it?
2 hours from now I'm having a coffee and a bun!!!