Is light a particle or a wave? - Colm Kelleher
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- Опубликовано: 14 июн 2024
- View full lesson: ed.ted.com/lessons/is-light-a-...
Can we accurately describe light as exclusively a wave or just a particle? Are the two mutually exclusive? In this third part of his series on light and color, Colm Kelleher discusses wave-particle duality and its relationship to how we see light and, therefore, color.
Lesson by Colm Kelleher, animation by Nelson Diaz.
Light is a WAVICLE
don't know english
Everything is wavicle :)
Lol
@@redox_reaction_phox sayin' to whom buddy?
@@universeisheregaming6400 1st: im a girl
2nd: im talking to the original comment
Me : What is light a particle or a wave?
TED : YES
they’re actually explained just fine
@@alireardon6664 they would literally have to explain quantum mechanics in an understandable way
@@alireardon6664 the explanation is okay, but indeed not detailed, as they have to keep it simple for everyone imo
WELL, IT IS BOTH . Because we can justify some optic phenomenums of light by saying that it's a wave; like refraction , diffraction, and reflexion. you can also justify the fact that light transforms energy to matters by saying that it's a particule. (sorry if I made some mistakes in english . i study MQ in french ;) )
I'm glad they shed some light on this subject
hello from the world that exists 6 years after this comment
*rim shot*
What a glowing review
@@jrhooman 😂👌
@@jrhooman it's now 7 years. Looking at the current situation it isn't going to go any longer XD
“I dunno lol maybe?” - Quantum physicist
😂😂❤
did i ask bro
@@kiranmatadeen did he told you bro
Lmao
Nice lmao
Classic TED
Is light a particle or a wave?
Thats a good question
**queue outro music**
I thought this was just me for a second. I was ready to pass the link along while watching, but then it just ended. I felt... shortchanged.
Both light is wave as well as particle
This video answers the given question, then again it does not ...
@@awr1001 schrodingers video
My question wasn't answered either.... 😑
that plaster on Newton's head is a brilliant detail!
Ikr
+ABHI The apple.😂😂
Is that because of the apple??
surely😝
I was just about to say that! Brilliant!
That's the guy! He's also done a few others on the nuances of color and light.
just pin this comment.
My M8 they will never dude😋
@Varanus komodoensis e
😀
Why don't you pinning it
The ending of the video says: "sometimes light behaves like a particle and other times it behaves like a wave", but that's not really an accurate definition of light.
Light are packets of photons, so its energy is discrete. However, these photons are described by a wave function.
Then, it's not correct to say that light sometimes behaves like a particle and sometimes like a wave, but it take properties of both concepts and its behavior is defined by these properties.
@HD_Cat u have a large brain
Photon acts like a particle!
Light = photon
Light acts like a particle too.
According to me , Light (Photons) are accompanied by the wavefunctions which collapse differently based on the way the observations are made, thus if the observer is quite big ( As in Classical Physics ) the wavefunction collapses and thus we are able to witness particle nature of light and if the observer happens to be very small( As in Quantum Physics where slits are made unimaginably small) the wavefunction collapses to its other Eigenvalue which lets us see the wave nature of it.
You said there same thing
Your explanation really it make sense.
So we don't know what the fuck it is
It's a God Created occurrence
I dont know what it is, therefore god created it. We dont know things, therefore god exists.
Christians disgust me
PapaKay lol not how we think
I'm a Christian, Deal with it So you speak for all of Christianity? Wow. Such modesty.
Appeal to ignorance and appeal to authority is *exactly* how Christians make excuses for the absolute disconnects between their supernatural world and the natural world the rest of us live in.
Ignorance is knowledge. What is a soul? No Christian can say, but they "know" it exists. How do you tell which gods create the soul? No Christian can say, but they "know" it is their gods.
Religious fallacy is the basis of Christianity and all other deistic faiths.
You do know that's the difference between philosophy and theology, don't you? In philosophy, statements must be logically consistent. In theology, logical inconsistency, including outright contradictions like "we don't know, therefore we know" are permitted as "the will of the gods" any time and any place they are needed.
+Jean-Luc Dushimiye it is both, it is energized particles; the form of energy is 'm kinetic. but I don't know what kind of particle, that is why I'm here
the bandage on Newton's head was a nice touch - anybody else catch that?
isaiah baggett what's its significance?
Don Jefé the injury caused by Apple falling on his head
Dr. Manoyana ucho ....oh gr8 i noticed it bt couldnt make it out...
@@yuuurawizzard I think it's the myth that newton had his moment of epiphany about gravity when he was sitting under a tree and an apple fell on his head.
No, you are the only genious
You explain complex topics like this in such a fun and interesting manner which makes me want to love science and explore it 😀
Samee
believe me you dont want to
Nature-What do you want to become light , particles or wave?
Light -Yes
What do you mean by nature
Nature?
The animation on this is gorgeous! Like all ted Ed videos, about 50% of my attention is being awe struck by the animation
"I dunno"
-Ted ed
ابن الهيثم ❤ الله يرحمه كان عالم كبير .. ان شاء الله يجي اليوم الي يطلع من بلداننا علماء بشطارته واكثر يرفعون الأمة
Light isn't sometimes that sometimes this. it's both! Wave and Particle, acting in Harmony
Bullshit! Light is not particles at all. One experiment in video clearly shows that. Think about radio waves. They have the same nature as optical waves because they are oscillations of the same matter - physical field. But we don't assign any particles to radio waves. The optical light interacts with substances and our body a little bit different than any other waves. That's why it's so mysterious to modern science.
+yzhishko Bullshit!! You are and idiot!!! he said both ya moron which explains all experiments. it's a partial acting in a wave and that with any wavelength that is it extremely rare ( and talk about rare, its more likely that a superpossition will come out with another superposition. ) because the particles are moving in a wave so when they cross paths they miss the collision and when they do its not detectable.
absolutely incorrent.
manyakmami
That
Is
stupid
manyakmami light has wavelengths that depend on the photons energy, photons inherently act as waves and move in a wave. That is why different sources of light can be different colors, they have different wavelengths
If you value your sanity, do not read the comments.
AGREED
Thank you for warning me
I think this is true for most videos’ comments
Thank you
i lost my sanity a long time ago
Gassendi said: "Light is a particle"
Hooke said: "Light is wave"
Planck said: "Why not both"
Sometimes it behaves like a particle and other times it behaves like a wave .
But it isn't exactly like either !
Video starts and ends on the same entangled question 👏
Thank you Colm. I've struggled with this concept for quite some time. Your explanation has helped to open the door to Quantum Physics for me.
1:53 I guess that APPLE fell on newton's forehead....
Colm Kelleher has a lot of lessons here... and they are the best always :)
Thanks to him and to the creative animators...
Just wow. The way you explain is excellent.
It's just like water. Sometimes you get drops of water ( particles) and when you put them together , you get waves . Just my way of making sense of it.
That isn't the same thing. When you have a ripple in water, although the particles move up and down, they ultimately return to their original position resulting in a net 0 transfer of mass. However light physicaly travels from the source to its destination.
Light is diffrent ...it's special
No definitely not😂
Wiowoooooowww. Thats a good one😄
Asmaa
اجل يا اختاه عندك حق
So are you a particle or a wave
Light: yes
I'm also talking about individual particles acting like waves. That is because a wave is a behavior, not a thing. A particle actually never appears to be in multiple places. You will only ever find it in one place at a time. The waviness is in the description of where you expect to find it.
This guy's explaining is soo good!
Listen the song : Waves Of Light - Brian Cox
Me: *Soo.. what is light?*
Physics: *Yes*
neither "particle" nor "wave" is not an answer to the question what the heck is a photon...what is an electromagnetic wave...what is it? What is it made out of? Strings of energy in the quantum field? I can't believe we've been pondering this stuff for well over a 100 years and we're stuck.
I really sometimes feel like stuck in some George Lucas film about FORCE being the main protagonist...while nobody actually knows what that bloody FORCE is !!!?! Force = Energy ... potentials and spin and probability...I mean,as the saying goes 'if you think you understand quantum mechanics, then you really don't understand quantum mechanics@ - that is indicative where our science is atm...nobody seems to understand what we're made out of...other than "electromagnetic waves" or "energy" or "potential" .... perhaps the answer trully is in the "Simulation theory"
Light is an energy which is itself invisible but makes other things visible.
then how are we able to see light rays
I don't like when they make videos about stuff without a definitive answer.
But I like knowing it anyway.
Keep up the good work
This video really brightened my understanding
thanks God for making channel like Ted ed
This relates interestingly to a experiment that Veritasium did with a box and 2 slits. the thing about the wave/particle duality of certain forms of energy is the way the waves are different from normal waves of lower energy types. I think what explains the waves/particles of light would be something more akin to a particle/WAKE duality, the particle leaves behind a wave as it moves through a medium!
Where is the usual narrator? His voice is so calming
Excellent video, thanks!
Quantum mechanics, god's plot hole in the universe.
i know this is a joke but that happens everytime with things: "why do my patients die on me everytime i put a giant unwashed scissors in their bodies? must be god's plothole" or "why do rocks bounce off of water? must be god's plothole" or even "why do grounds all of a sudden sink? must be god's plothole" and everytime it is explained with science so what is different with this situation?
but i have to admit it was a funny joke.
are you related to Aditya Saraff
Or rather, a limitation of our mind; Just like how understanding integration is beyond a dog's limits
I asked this to my father when I was in 2nd grade and he laughed and said it would take too long to explain
if after 10 minutes of explaining and you respond with a "huh?!" i would just say "ahh don't sweat it, maybe an other time."
Didn't learn anything new but still drawn to watch just to enjoy the way it was presented.
Yeah, they really brightened my day.
What if light travels as photons in the form of waves?
They'd still collide when two beams of light crossed each other, causing scattering which doesn't happen.
Top 5 The thing is it works with single atoms too
TheSpaceAce that's a pretty weak response. Water waves, which are made up of water molecules, do not scatter when interfering with each other, similar to how 2 or more light beams interact.
What are you even trying to say?
Isnt that basically like saying a chair in the form of a table therefore saying its actually a table?
Let's not goona neglect the fact that we are also wave & particle at the same time
Thanks,Colm Kelleher,you presented it too easy!
Awesome illustration & explanation, thanks👏🏽👏🏽
Short answer : both
Long answer: both but not both
Longer answer: BOOOOOOOOOOOOOOOOOOOOOOOOOOOOOTH AAAAAAAAAAAAAAANNNNNDDD NOOOOOOOOOOOOOOOOOOT BOOOOOOOOOOOOOOOOOOOOOOOOOOOOOTH
Is it possible that a photon is a particle that acts like a wave because it has a dark matter particle orbiting it, pulling it into an axial wave motion as it travels? And that perhaps the only reason for photons' max speed limit is the dark matter they're paired with? That could explain the double slit experiment results with some interaction between the dark matter and the detector. This could also explain the deflection of the axis of the particle's wave motion moving thru polarizing filters rotated less than 45 degrees apart.
This could also explain why the universe is expanding from the central Singularity point of the Big Bang outward in all directions faster than the speed of light into previously completely empty universe space, given that there is no Dark Matter there yet.
Hello, after a long time. Hope you are doing great. Did you get the answer?
I appreciate your theory of presence of dark matter but how to decide when light will behave as a particle or wave and at what conditions?
This is an interesting theory!
@@nevanjohn Thank you my friend.
Interesting theory, but the issue is that electrons and other atoms also behave in the same way.
Are they all too connected to dark matter?
Reasonable theory. On a side note for anyone....when is a photon a wave? Answer without referencing the double slit experiment.
Your videos are very informative
(Answer needed from TED ED itself)
How light can act as a wave? (Because wave always requires a medium to move, just like a sound wave. And light also travels through vacuum). Does light contain any amount of physical matter? If light can sometimes be a wave, then can we believe in dark matter, present in vacuum to support the wave of light? How is light seen on microscopic level in a vacuum in contrast to a microscopic image of vacuum with no light? Or do I need to study something to get my answers?
Me trying to reply and ignore the fact it said only Ted Ed: Well it is-
Mamta: NO
@@andrewli8173 Thanks for your attention Andrew, but can you be more specific?
At 1:45 those particles looks like the energy plasma that emit from a hero's hands in anime.
fuckin weeb
So we can say light is basically waves acting like particles ryt???
Perfectly explained😊
Would have liked to see some examples of tests made where they show how light acts as a particle or wave.
محمود مجدي 👑
That's the exact reason this is called wave-particle duality. Yeah, i'm showing off as someone who learn quantum physics
Wave's and photon's do not exist it's impossible. Wave's of what? Look up Theoria Apophasis on RUclips, he also cover's extensively on Magnetism. That explanation's coming out of that guy's mouth with make your head fall off your shoulder's and flop on the floor
I LOVE THIS GUY HE SHOULD DO EVERY COMMENTATION
You people are great! Keep doing and creating these amazing videos.
After the discovery of photoelectric effect, Einstein showed that light is neither a wave nor a particle but a wave packet.
4:01 "Well light isn't really anything we're used to dealing with our everyday lives."
Well..., actually light *"IS"* something we're used to dealing with our everyday lives.
He actually said 'Well light isn't really LIKE anything we're used to dealing with IN our everyday lives' 😅
¡En física, me divierto mucho aprendiendo con la Sra. Kim!
you gave me more information then the video, thank you !
Light is neither a wave nor a particle. But it shows properties of either, depending on its energy.
Actually, all matter is both wave and particle. And all objects emit radiation (light), just in the infrared red spectrum
omg the bandaid, my deepest respect.
This is the first time ever I have clearly understood particle and wave nature of light but before I've just studied it in my book and unable to figure it out 🧠
2:52 Woah........ I feel dizzy
what if light is both, a group of waves being trapped together, and moving through space like a particle, but in fact being many waves. But, they also act like a force, presenting energy, and power. Light waves might entirely be a new combination of force, waves, particles, and maybe other things we have yet to find.
we need to study light heavily, so we can find hope in developing Lightsabers
Can you make a video on the difference between electomotiveforce and potential difference
great great great! also, keep this guy, his voice is awesome!
DUALITY!
if u didn't watch the video yet, light is both a particle and a wave
Amazing video, good job
At the end of the video I got an ad that was like "Accidentally using the light while taking a photo, having the screen brightness too high". Wow the coincidences. It's an Italian ad.
But as with all these experiments that tried to show that light is a particle, can't thinking light as a wave also does the job?And one big question to ask.If light is a particle or partly a particle, how is it possible that the speed of light traveling through a the same material (water for example) be constant even though one is shot out of an extremely weak torchlight, while the other from a very strong flashlight. Only waves are able to have constant speed of induction (through fixed frequencies), and a wave made up of particles is not an explanation for this too in my opinion.
+Luyang Che no actually, because sometimes assuming light is a wave is not enough to explain its properties. for example, the "quanta" thing he talked about. If light is a wave, it cannot transfer energy in defined amounts, or "quantas". in that instance, it acts like a particle. I think the confusion arises from people ignoring the "acts like"; part of the sentence. light is never a particle, and it's never a wave. it's something else that we can't explain. but wave theory comes in handy when we are trying to explain and predict certain behaviours, and particle theory comes in handy in other instances. in reality light has no dual properties, we just don't have a unifying theory to explain all it's properties so we keep using the two theories we have.
Well, I dont exactly get it how light cant be transfering energy in defined amount when purely just a wave. Light works in many ways very similiar to sound, which is a wave.
Even if light cant be just simply waves, if I am not wrong, the way the scientist came to the conclusion that light is in "quanta" (which came from the word quanity as I know it) just because there theory explain it, which I think is flawed, as though it can explain this phenonemon, it isnt proven to be only possible explanation, thus not a reliable explanation.
Please correct me if you think anything I said is wrong.
no you are right in the sense that this "dual nature" explanation is flawed. Clearly, light cannot be a wave and a particle at the same time. We need a better theory, but we just don't have it yet. that's why we explain some properties of light (like quantal energy transfers) by using the "particle theory".
imagine this; you know what a solid is, and you know what a gas is, but you've never seen a liquid before. and suddenly you discover a liquid. it's weird, because sometimes it acts like a gas (for example, it takes the shape of the container you put it in) but sometimes it behaves like a solid (for example it has a fixed volume). so you try to explain what a liquid is using these two terms; gas, and solid. obviously you need a better theory (i.e. you need to realise that the spacing of the atoms are not as dense as a solid and not as sparse as a gas, but lets say you don't know what an atom is). that's the same with light- we can explain it's behaviour with the theories we have, but they are flawed theories because they can't explain all properties at once.
does that make more sense? :)
Great analogy, that explains a lot, thanks! :)
Luyang Che light interacts with other light with wavelengths, that is, light will always travel the same speed (speed of light) but when a photon has more energy it has a shorter wavelength.
Light is a wave-particle. When you observe it light it acts like a particle, but when you don't it act like a wave. It's just how quantum reality works.
Wave's and photon's do not exist it's impossible. Wave's of what? Look up Theoria Apophasis on RUclips, he also cover's extensively on Magnetism. That explanation's coming out of that guy's mouth with make your head fall off your shoulder's and flop on the floor
That's not reality first it makes absolutely zero sense second that's how science works people act they discovered the secret of the universe until a guy comes some 100 years later to say that everything we thought is wrong and light turns out to be one totally different thing and obviously all of us will be wrong in the future
Human brain has limits just like your sight has limits you can't try to understand everything physics isn't the ultimate reality it will never be perfect we just try to understand as much as we can to help us in our lives but good luck trying to explain reality
At university I got a simple explanation. Both wave and particle description of light is models used to explain some behaviour of light. A model is just a simplified description.
I really wish if our schools would teach like this....its so interesting nd I am not even a bot bored bt rather very interested.....its the same theory bt different teaching techniques...
Aha, I understood what they are saying! But now I have a headache and i am feeling dizzy😵 So I think Qûâñtum theories can be understood and not understood at the same time.
Gosh, what am I thinking!!😲
رجالة عبدالمعبود
Do you have any idea how little this video satisfied my curiosity.
beautiful video thank you
Mr Mahmoud Magdy
so it is a partiwave
One way to think of wave particle duality of light and matter in the form of electrons is that it is forming a blank canvas for us (atoms) to interact with; we have waves over a period of time and particles as an uncertain future unfolds. The mathematics of quantum mechanics represents the physics of time with classical physics represents processes over a ‘period of time’ as in Newton's differential equations.
In this theory the mathematics of quantum mechanics represents geometry, the Planck Constant ħ=h/2π is linked to 2π circular geometry representing a two dimensional aspect of 4π spherical three-dimensional geometry. We have to square the wave function Ψ² representing the radius being squared r² because the process is relative to the two-dimensional spherical 4π surface. We then see 4π in Heisenberg’s Uncertainty Principle ∆×∆pᵪ≥h/4π representing our probabilistic temporal three dimensions life. The charge of the electron e² and the speed of light c² are both squared for the same geometrical reason. We have this concept because the electromagnetic force forms a continuous exchange of energy forming what we experience as time. The spontaneous absorption and emission of light photon ∆E=hf energy is forming potential photon energy into the kinetic energy of electrons. Kinetic Eₖ=½mv² energy is the energy of what is actually happening. An uncertain probabilistic future is continuously coming into existence with the exchange of photon energy.
Thanks I got some ideas 💡 to right down
isn't light just the disturbance in the electric field
مين جي من كتاب م محمود مجدي
Your intro is awsom👍
Love the band-aid on Newton's head.
Both it makes its self a medium to use
VeRGoGaming 891
What do you mean?
I think that Connor is talking about the Pilot Wave theory, which states that the particle sort of has a wave associated with it, which interferes with other particles' waves, and influences its motion
Maybe it should be the first in a new category "Wavicle"
now thats genius
Well so are electrons.
3:32 the guy with glasses and mustache is Max Planck
thank you so much
It might be a wavy particle
or a wave made up of particles
That's what I thought
Daniel Lock people are trying to figure out how this could work, but its sketchy af
Daniel Lock It's more like a possibility wave. It creates interference patterns wich describe where the photon (light particle) lands with wich possibility. Wich means it's a particle wich travels like we expect a wave would
Either that or it's a wave which influences the movement of a particle in specific ways (de Broglie-Bohm Pilot Wave theory)
yes
Can we at least make a new name of what light really is? Like.. something that behaves like a particle and also like a wave but is not a particle nor a wave.
It's called electromagnetic wave
awesome...
Then what do you call electrons? These behave like waves when not observed and they behave like particles when observed.
Ok I get it. it is a pwave , a parve or quantumwave you name it. Both e- and photons are qwaves.
it's called a wavicle
This guy's voice is awesome.
Well.. glad we cleared that up 😁
They really filled the void here. Now the question is, as we all know, how can we get a Dyson Sphere around the sun ASAP?
Can we accurately describe light as exclusively a wave or just a particle?
No.
Are the two mutually exclusive?
Yes.
Exactly. I think one of the prime drivers for the discoveries made by Einstein was a forthright insistence on rational intelligibility. That's why he didn't like quantum physics. If our 'model' for what light is isn't rationally intelligible there's a simple reason:it's not correct (or, at best is incomplete)If you watch videos like this or videos about the double slit experiment you hear expressions like, 'this runs contrary to common sense' or 'despite what our intuitions tell us...'. Rather than acknowledging that there's a problem with our models: namely that they're rationally contradictory and unintelligible, the criteria of intelligibility get's obscured by downgrading it to a desire for 'common sense' or for things to follow our 'common-sense' intuitions. At the same time the irrational gets elevated to the point of being mystically inaccessible to our minds, but none the less, amazingly valid.
What a crock. Something that's in 2 separate places at the same time doesn't quarrel with common sense, it defies reason. And there's an easy way to explain where we are (if not what's going on specifically). We've discovered phenomenon experimentally that we can't yet explain. We just have to admit that we don't understand the results, and don't have a satisfying explanation for them.
Keep the results, discard the explanatory bit (since it doesn't make sense) and try again! Maybe the particles are riding waves that we cannot readily detect (like beach balls at a wave pool. I know that's a childishly uneducated guess, but the central point is that as long as we're cunningly satisfied with irrational explanations, there's no urgent impetuous to think creatively, shift paradigms and upgrade our explanations.
In quantum theory, it seems like there's a kind of eccentric distinction to the irrationality of current explanations. Isn't the universe weird! the more bafflingly irrational the explanation is the better.
Why would they be mutually exclusive?
Erik l
For a particle the dimension, by definition, does not matter. For a wave it must.
There are actually a lot of reasons though that something cannot exist for which the wave model and the particle model are accurate, and they are mostly of the form "It's this way not that way." The math we use to describe them is different. Therefore something cannot be both.
*****
How?
+Matthew Helm Imagine a boat gliding through an infinite lake. You could experience it as an object moving through space, but you can also measure the waves in the lake.
I think we have a wrong picture about space being empty, it's more like a field, a 3D structure, and light is traveling through it, and the interaction with it causes this duality of wave/particle effects. But you can't separate the boat and the waves, they coexist and are part of the same action: light traveling through space-time. What do you think about this?
Thanks for that my concept touch an upper level Than before.. 😇😇
The ending was awesome😅