How do we KNOW light is a wave?
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- Опубликовано: 2 июн 2019
- We might not have unified electrodynamics until 1865, but we've known light was a wave since the original double-slit experiment in 1801. Let's talk about diffraction and wave interference.
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Where Does Light Come From?
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For anyone trying to find the next video about how photons are also waves: ruclips.net/video/iyN27R7UDnI/видео.html (When videos are older like this, it's almost impossible to find their follow-up videos.)
i sort by date published and watch them a bunch
How do we get single photon..🙄
Ocean waves with longer periods carry more energy and travel faster.
In contrast, light maintains a constant speed; the shorter the period, the more energy it exhibits during collapse.
Therefore, it cannot be described as a wave, but an alternative term may be utilized.
The ambiguïty of light and fotons and electrons bothers me..^>~ as if they create their own carrier like a train putting his own rails on the trail but at an incredible speed ! That's why i come up with that ocean, just beiing everywhere, nada travel, just the impuls racing through what ever medium... i'm maybe crazy, too 😊🍀🧡🌞👍👋FM
I love how he states something....then he asks himself a question we are all thinking, and then he answers it! So awesome!
Love the "Shush !" too, exactly when I was asking myself the question lol
Yes, _exactly_! He's good at anticipating follow-up questions and asking them in a non-patronizing way. He has great communication skills.
I also . .
Don’t be silly, that’s Question Clone.
Sign of a god teacher
Being shushed has never made me laugh so hard.
Never seen It's Always Sunny In Philadelphia?
best explanation of this experiment I've ever seen
Indeed. It's rich in details and it's clear to a level I didn't even think possible. Nick is the man for concise and precise explanations.
Also animation quality went up again.
@Johnny Doeboy the electromagnetic field is the does
as a byproduct of electromagnetic radiation
As for science being dumbed down Im pretty sure this show is for kids I mean he's a guy in a lab coat with a bat man shirt making youtube videos for free on the internet are you expecting to watch his video an then get a science degree?
@Johnny Doeboy you're just being semantic. No one thinks it's a wave like in the ocean
Steak Electron refers to a small wave in the electron field or a particle (particles are localized waves in the field).
Fields are basically plains of existence for waves. The waves are energy.
Fields do have their own energy called vacuum energy or zero-point energy.
This energy is always there and cannot be taken away. If you try to, the field will make a lower vacuum energy.
The vacuum energy is the baseline energy.
There will be a little uncertainty in the energy (and everything else) in the field.
Just a question but do the dump trucks move with the wave or do the dump trucks just go up and down?
Btw I get that the field is waving and causing the action.
Johnny Doeboy I get that you have a large emphasize on electrons aren’t hard balls but rather deformations of the electron field.
You don’t need to call me out for being a random guy. We are all random guys learning about great discoveries together.
Not everybody is right. And most likely our ideas will be seen as basic and outdated like the four giants.
The four giants of electricity and magnetism and such were great at manipulating the microscopic world to create amazing inventions but their ideas are only stepping stones to the achievements we have now and we will be stepping stones for the next generation.
Your animations are so beautiful. Thank you for these wonderful videos.
Thanks! I spend a lot of time on them.
@@ScienceAsylum Understanding such phenomena has never been this easy...
Love your work so much...
By now it seems like you could fill up an entire beginners lecture or high school course with your videos and, even without covering every technical detail, students would learn more and understand it better than by listening to most teachers.
Seriously, how is it that you manage to explain the essentials of a topic every time so on point
Beginners, definitely, but I would go even further with some videos. I studied some things in my second and even third year of uni.
prize for best illustration showing how peaks and troughs form, also depiction of it in 3d space
Honestly that's when the light bulb went off in my head. This was beautifully explained AND demonstrated!
Definitely check this video out. It does a fantastic job of helping see how the pattern forms.
ruclips.net/video/gRX-s0p4HpM/видео.html
One thing I like about this channel is that you answer questions that are on my mind but other sources fail to because they seem like dumb questions. Like what happens to the energy of the wave? But it's not dumb it's just that you actually understand your audience. Great work. Keep it up, please.
"I said 'shush'!" is now my new favorite phrase.
I'll make a compliment that I should've made a long time ago. I appreciate quite a lot your lessons, they're among the best I've seen in my life.
The most impressive part of all this is that it's still common among the population to think that there isn't much skill involved in helping others, explaining something, teaching someone. And many think that expertise on the subject is the only skill needed to teach well, ignoring the deep needs of empathy skills, communication and linguistic flexibility, and many others. It's because of this common misconceptions that STEM teachers around federal universities here can be so bad at teaching sometimes. No matter how ingenious and great they are at research, they can still be dickheads with students.
And consciously or unconsciously, you've proven to know all this and much more than me about teaching strategies and skills. Your empathetic skills and considerations towards the viewers interests and doubts are strong, and one of your best assets.
The best part of this is that you also seem to go pretty deep on your knowledge of physics, enough for you go beyond the average teaching youtuber, and yet, you maintain your ability to teach properly that complex knowledge to your viewers, showing great skills to simplify and make concise extremely difficult concepts, enough for an interested student like me to understand.
Thanks Nick, keep being great.
Thank you for the kind words :-)
@@ScienceAsylum sir why light just don't go straightly while passing the slit? Please sir explain me
@@niloybhuiyan3374 literally watch the video, it explains your question...
sir
Good point. One thing that students don't realize is that public school teachers are actually certified teachers (with buttloads of training). College professors/ instructors are not trained to teach (unless they were former public school teachers). That's the main reason they are so horrible.
Unfortunately I don't feel it's common for the population to think, it occurs, but it's not common, uncommon potentially.
I've watched probably 30 videos on the double slit experiment, and none of them, NOT ONE, explained how photons are just waves and how the field is one entity and that is why it can interfere with itself or that superposition and interference are linked. Instead they all seem to give into some sort of mysticism and woo factor. You rock dude.
Yes dude the porpose of science is to dimistify something others are doing opposite..
Dido.. hopefully Nick can also demystify the mechanism that causes wave collapse/ and our seemingly mysterious perception of particles ...
Shooting other particles (electrons, atoms, molecules) through those slits creates the same interference pattern, so... you mean those particles are just waves?? The woo factor is still there, the quantum physics still has some mysticism.
@@marxk4rl that’s a legit point
QuestionClones "but if the waves cancel, where does the energy go?" and Ha, again: if we think we already know the stuff then watching this video still improve the completeness and clearness of our insight! Such a short question but geni...Oh in short: I love these video's!
Love these timelines. The history of science is just as fascinating as the science itself.
Underrated comment!
I’ve been known to interfere with myself. I am a wave?
Am I a wave ?
Yes.
Those EM-Field & Wave-Interference Animations are so beautiful! And almost self-explanatory! Very nice work!
Thanks! I'm really proud of those animations. They're some of the best I've ever made.
Really well done on the graphic work, very educational again. Thank you for this.
Thanks!
Love how you animated the EM field at 4:33 :D
Also, stay crazy like supercritical fluids (they just won`t stay inside the box ) XD
This science channel is my favorite on RUclips. You are an incredible teacher Nick.
Thanks Nick another great video to chip away at the magic tricks 👍
You have a very original way to talk about known physical experiment and models in your videos. Love them
Great animations again. I've yet to see anyone do it they way you have.
First the 2 red waves pivoting to show the interference (3:15), then the other field animation (4:33).
Brilliant!
Thanks Nick, as a high school teacher these latest videos are perfect for the classroom. I showed my 10th graders your video on colour and they loved it... it covered everything they need to know and they were hooked for every second... you've pitched these perfectly! This new one is perfect for my older students and I just wish I had it a couple of months ago when we covered this! I'm just glad to know I have it for next year! Cheers!!
That's wonderful! Thanks for sharing with your students :-)
Ah commercial use; hope you're paying Nick for doing your job 😋
I was waiting on this video. Thanks for clearing that one up.
Incredible explanation, great Nick! Please more about photons!
0:53 I love this!
Finally at 63, with 4 college physics courses in my distant past, I finally understand. Via RUclips. Did not see that coming...
You're welcome :-) Glad I could help.
Your work, explanations and animations are great. 140k subs are too little for such a quality channel :/ Keep up with the good job!
Instant like as always. Please keep on the good work.
Your video is more and more useful for me...
your the best youtuber i have ever seen
Amazing video. The visuals really helped a lot. Optics is still one of the most mysterious and interesting branches of physics to me, but your videos sure have _illuminated_ the field a lot. Your take is always the most digestable form of information I can find. Thank you for making science a little less complicated for us.
Glad you're getting something out of them :-)
Best illustrative display of the fields I've ever seen. Top drawer animation!
We know it, and we don't know it. Our knowledge is in a superposed state of existing and non-existing.
The more i know, the more i know i don't know..
Time to learn things. I am okay with this.
I've never seen a visualisation of the interference like yours at 4:32 That helped a lot. Thanks!
You're very welcome :-)
Thanks for another amazing video
But it's the first time that I knew everything you said before.
Eagerly waiting for the next one and I know that it will blow my mind as I will again discover something really awkward.
Thanks again
You won't be disappointed.
You are brilliant!! You're definitely like our very own, real life Professor Proton!!
one question ''how the heck you only have 140k subs''
"I said shush!"
@@aqimjulayhi8798 you know i love this channel and you go ''shush''
He doesn't upload regularly. The RUclips algorithm doesn't like that.
I know right..lets share this amazing knowledge with our friends. The world needs it.
@@sweiland75 🤔😮ooowwwwhh..
Great illustration! ;)
great video keep up the amazing work
I was expecting you to talk about what fact made us first suspect that light is a wave, all the way to the confirmation that it is indeed a wave. But this was really a good video too.
Students every where: "So light is a wave and a particle?"
Nick: LIGHT IS A WAVE. FULL STOP.
Some say "A Wavicle".
I think it's wrong though. As far as I know light is a particle when it's observed but a wave if it's not observed.
The shush gets me everytime 😂😂😭😭I love your channel
Great video. Great explanation on a theory most people struggle with.
You missed it entirely. We know light is a wave because if we wave at it, it waves back. :p
Right! I often do that with my shadow bro
Ha!
@@tiagol8200 Damn, mine only gives me the finger.
Science Asylum's next video is going to be about how we know that photons are particles. You'll see.
Your description of superposition in a field is rather mind-blowing. Wow. Thank you.
You're very welcome :-)
Great work again!
What about the probability-wave collapse during measurement? I thought they acted like particles if measured
Not really. They only _appear_ to. We'll talk about it in the next video.
Steve Dixon If one puts an Avalanche PhotoDiode in a place where there’s an EM field, occasionally there will be an "avalanche" of current: the device was designed to do that occasionally, so it does it occasionally. If you put the APD in a different place, you get more or fewer avalanche events, but what causes that? Was it because there are photons or was it because the APD was designed to do that? If you look at the electrical signal much more closely, it’s not really an absolutely sudden event on the signal line: it ramps up very fast, but it’s not instantaneous. All modern experimental apparatus is the same: signal lines into computers, attached to exotic materials that are driven by exotic electronics.
Quantum theory doesn’t necessarily talk about "collapse" during measurement, it can also be taken to describe and predict the statistics one will see of everything that happens on a signal line, and jumps are only the first level of detail about what the signal level does picosecond by picosecond. Sorry: you asked a good question and I’ve given you my very idiosyncratic answer (and compressed enough, as well, that it’s likely incomprehensible.)
Yeah he left that bit out of the explanation of the double-slit, which is honestly one of the main points of the experiment, and opened the door to the whole field of quantum physics. Unless we figured out quantum physics over the last year or so, I always thought the door was still open as far as what light is, depending on what interpretation you used. In most, it seems to be that light is both. The most-accepted Copenhagen interpretation states that light is essentially a wave that becomes a particle. The pilot wave theory believes that light is essentially a particle that is pushed by a wave, so in effect, it's both. That being stated, we still haven't figured out which quantum theory is the correct one, so it's still largely up in the air. It is clear it exhibits behavior of both though.
@@taragnor nope.its only wave.if doesn't say in one video means doesn't mean he doesn't know it or he believes in what u say.
a photon interfering with itself, that took me a long time to really wrap my head around it.
Welcome to the world of quantum physics
@@addajjalsonofallah6217 i been at it for 15 years :(
@@xthe_moonx
Me not as long but it never stops being confusing and weird
where have you been all this time? Im just glad i found this channel :D
I'm glad you found it too 🤓
Wow,those animations are rad!
Make some videos about relativity.
BTW You are awesome dude😍😍😍
Subscribe to the channel, you're a bit late.
Playlist! ruclips.net/p/PLOVL_fPox2K_vPTkNljpO0qG_H--J_frW
make a video on the standard model
Honestly the best explanation for the double slit experiment I've seen thus far.
Love ur vids Nick!
I'm guessing the next video will mention the photoelectric effect
And the blackbody radiation equation with the addition of the planck constant
First...always loved ur videos...❤
*Fourth 😉
@@ScienceAsylum thank you for your reply...i have lots of question in physics but noone tends to answer. even my teachers say don't ask silly question.i am obsessed.....i have cleared various doubts through this channel...thank you very much🤗
I had this confusing regarding photons for so long !! TYSM Nick !! You are the best !!
such a beautiful explanation sir, thanks
Thanks as always. Is that a probability wave or an actual wave?
An actual wave. In the E.M. field. That screen with points and crosses animates that field while the wave is passing throug it.
An actual wave. A wave in the e.m. field. That animationscreen with all the points and crosses, that animates the e.m.field while a wave is passing through it.
Thanks again for another great explanation
I wonder how I would have to place 2 light bulbs to darken my room thanks to interference :P
that’s what i was thinking, a flashlight that emits two destructively interfering laser beams, what would it look like?
You will never get less light than what already is there. But i suppose they could cancel out in some places.
Luke Haulin but lasers!
Amazing work with 3D animations Nick!
Thanks! They were a lot of work.
Best video just in time for my physics exam! Love this channel
Only 141k subs?
RUclips is weird😒
Next: how do we know light is a particle? That's the really hard part IMO.
This is amazing!!!!
The video's really gooood!!!
You make things simple even for a beginner like mee....
Wow crazy scientist explaining much better than normal man.
So light is not a photon? Nick what are you doing??🤔🤔
He said a photon is a wave. Light is always a wave, just sometimes its wave properties don't matter so we can treat it like a particle.
@@danbodine7754 shhhh😂
Light is made of photons, but photons are not what most people _think_ they are.
Thank you for your videos.. your the one of a few that makes these things understandable 😃😃😃😃😃
love your work
Wonderful demonstration - bravo.
this guy works for his money nicely
Thank you for this great video, love your channel! Could you please explain the pilot wave theory or Bohemian mechanics in one of your next videos?
I will... as soon as I'm comfortable enough with it to explain it. 👍
Seriously!! That's the lesson I never liked in my physics book. If u made this video 3 months back it would have been a huge help for my exam
Thank you for the gret work ! Love it
Awesome !! As always.
Another great video!
Nice video. I hope you continue about photons in later videos.
Finally someone explains this so it can be clear! Thanks Nick.
I love you, you deserve far more subs than you have
Very informative , good make more videos
What a coincidence!
This question was lurking inside my head all day as I started learning more about quantum mechanics and the nature of light. And just when I thought I could never get it, this remarkable video changed it all! Thanks Mr. Lucid!!
We'll get more into quantum mechanics next time :-)
Dude, awesome animations
Thanks!
The best Animation By FAR!
Brigadão para o sujeito que traduziu, belo trabalho!
I've finally found some time to translate this video into Hebrew.
In my opinion, the double-slit experiment is one of the most intriguing & fascinating science experiments ever. I've done it myself few times & it's mind-boggling!
This experiment is not just about waves or photons, but about our very own human fallibility of grasping intellectually such phenomenon in nature. So much so, that there are still scientists who try to disprove the duality of particles(Including photons).
I could have lectured for hours - just on this experiment.
Great video & cheers! Keep up the good work! You and your twin-dimensional body ^_^
Thank you for translating!
I can't wait for next time. I love this guy.
Can't wait for next time. 😃
3:12 This animation is very well done
Looking forward to the next video sinse my professors insist that there is a wave particle duality which you have covered before. Is it posible to describe radiation pressure which is calculated in statisical mechanics in terms of waves? Or is it because pressure, in general like temperature, only makes sense as a statistical property? Keep up the great work! The attention to detail is superb! Edited to fix gammatical error that I spotted.
Great man
I think my brain shorted. Need to watch it again.
Hey Nick , love your videos man
Can you make a video about why atoms/matter block light from passing through ?
Yep! I'm working on some quantum optics stuff right now actually :-)
that animation of how light travels in straight lines after the double slit to produce a wave pattern was helpful.
you quench the thirst of mine in how to imagine light waves !!! now I can sleep peacefully
Hello, I'm a telecommunications Engineering student so basically anything wave related is what I know.
I understand how electromagnetic field work and all. But the question I keep asking that I never get an answer for is: what is the electromagnetic field exactly?
I know all the math and how it works but what is it EXACTLY? Like physically? What is the nature of the field that can be disturbed by a photon? Those arrow we represent coming out or in a charged particle, what do they represent physically?
I got into some quantum mechanics stuff to help me understand but nope, It made it complicated even more.
You ask a difficult question. What is the electromagnetic field exactly? It’s difficult to answer questions about something that is considered a fundamental fact of the universe.
First, a field is just a name we use for the collection of all points in space that we can associate some number to, like temperature or pressure or electric push/pull, usually more than one number and sometimes with a direction. It’s an abstract mathematical entity.
The electromagnetic field has numbers like energy, momentum (with a direction), amplitude, wavelength, and frequency. This field can be viewed as a combination of a stronger electric field and a weaker magnetic field that both have magnitudes and directions of influence (the arrows). Oscillating charges produce variations in the electric and magnetic fields that may be regarded as waves, the aforementioned numbers change from moment to moment and place to place in a self-replicating fashion influenced by its neighbors. At a quantum level, the numbers exist only in a superposition and do not change (or don’t have values at all), they have probabilities that change instead. Energy is quantized as well.
What exactly underlies a quantum field if anything, such that it can have probabilities at each point in space, isn’t clear. I think it is just about geometric relationships between things, or places where things could be. So a field just isn’t physical. It’s a background description of how interactions can play out.
Sorry that’s the best I can do.
Edit: The electromagnetic field isn’t caused by a photon. The field is an independent thing. A photon is just a persistent wave-like disturbance in some part of the field.
"the same interference pattern emerges" ummmmm what?? you REALLY should have mentioned that still, as soon as we have a detector on the slits to see where the photon passes, the pattern changes to conforming a particle nature. Without that, you make it sound confusing IMO.
Otherwise: a FANTASTIC explanation and visualization. i just had a moment where i felt a little bit smarter than before.
I'm saving all that weirdness for the next video :-)
This video had to take inconceivable amount of time to make. I really appreciate your work and effort. I'm buying the E-book at least, cuz I can't support you monthly :/
It was a lot of work.
"I said SHHHH" lol