The equation of a wave | Physics | Khan Academy

In this video David shows how to determine the equation of a wave, how that equation works, and what the equation represents. Created by David SantoPietro.
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Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.
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I think this is one of the best explanations I have ever seen, btw much better than listening to my physics teacher :D

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same dude!

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It seems like my graduation from university pretty much depends on KZbin. Not sure if that's a good or a bad thing.

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It’s good that you have something you can rely on at all, but in case KZbin ever fails you, you might want to have other forms of resources as back up.

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you gonna have the like more than you expected, because most of the people doing like you. unfortunately me too

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Imagine what we did before KZbin

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InvincibleAirman the same lol

[@yogitagoswami9286]

They teach you this in university!!! Here in India they teach us this in 11th grade.

[@fromexoplanet21]

I've never seen someone explain something so easily and in a way that makes total complete logical sense....our teachers just write some equations without explaining what each of the symbols and numbers represent nor what their relationships are to one another...it is a waste of my time and my life...but you just managed to explain math in such an elegant way that I've never seen before, thank you💖 I basically have survived all these years just by watching KZbin videos...you guys are the best teachers I know, hats off to you💖💐

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and I was hoping my university is the only place that sucks and treats us this way 🥲

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I want to thank KZbin and Khan Academy as well as many other knowledge provider like Khan Academy, many education videos are a lot better than what my teacher taught me, KZbin is a great platform to study, I hope more people can benefit from this platform, knowledge can be spread in a faster, more accurate, easier to understand way

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The explanation is so clear and intuitive! I wish this channel gets more appreciation, it deserves it.

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oh wow! how can the whole world not be geniuses with this quality of explanation so widely available. Too bad, I'm sucking all this up till its dry. Oh BTW Thanks!

[@ritzrox4679]

My mind is literally blown, I was searching for a derivation or at least an explanation of the wave equation and you explained it in such a clear way linking every step to the next. I can’t thank you and khan academy enough for putting such amazingly simple explanations for everyone to understand

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I'll be ever grateful to you for such comprehensive explanation . Really, i could understand this chaotic wave equation only by going through channel ...

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one of the best explanations i have ever seen

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kzbin.info/www/bejne/e5zGkqyIhZp8fbs get a real view of sinusoidal waves

[@NaveenKumar-vj9sc]

I enjoyed every moment of the explanation. This kind of explanation, I was always expecting, when I ask someone to explain me about wave equation but never a satisfied answer i got so far and now i am very much impressed with the content of the video and the way it is explained. I will keep from now on, this as the base explanation, if would want to explain anyone on wave equation. I just want to give infinite like to this video.Thank you soooooooo much.

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@Bruce Xu specially during this pandemic

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[@rubaiyatmehedi9337]

@Lisa Simpson which grade are you at?

[@rubaiyatmehedi9337]

@Lisa Simpson no need to apologise for your English you're pretty good. And you definitely should check out the trigonometry playlist from Khan academy. These are pretty basic things and you probably should've had a decent idea about these basics of trig since you're in your first year of physics. It's true that it's never too late to learn something but it might affect your institutional grades mate. And good luck😉

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[@simranjoharle4220]

This video makes that complicated equation look so elegant....thank you so much!

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[@wesleymarquardt4708]

THIS WAS SO GREAT. I was so confused when I was given an explanation in class, but this made it so clear. I had some homework concerning this equation and I was totally freaking out, but this was such a life saver. I breezed through the questions after this so thank you Khan Academy!

[@rahulsurwase6627]

Khan academy should get a Nobel for peace.....you have brought about a revolution in education field.... Thanks...from this generation Sal

[@shmkrar1153]

I have been trying to understand this equation for a long time - I mean years - and I finally get it. Thank you! 😊 Thank you very much!

[@donlimonesioyt9644]

I’m studying 12th grade physics in Spain and this video really helped me. Thanks

[@lakshmidevihs2787]

this was out of this world thanks a lot

[@shakirbashir132]

8 hours of lecture notes and 3 text books, still understood almost nothing. 5 minutes of this clip and im an expert! Thaaaannkkksss!!!!

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No words to express how thankful I am for such a beautiful explanation free of cost

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Sir this is what I was searching for days.... Thank you so much ❤

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Incredible! Even though I didn't get all of it...but the way you explain the formula was absolute stunning! Salute to you bro

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[@MrExtremehustler]

This guy David is really good. The only person I actually listen to from khan academy.

[@harshguptaxg2774]

Thankyou very much Khan Academy for these kind of intuitive explanation of these concepts

[@abenaboateng650]

Wow so clear. Never fully understood where this equation came from but it makes so much sense from this video. Thanks!!

[@roopeshonline]

Definitely it is going to be my one of the most favorite explanation seen for ever, great job, thanks

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Thank you so much! Your a life saver for University Physics students.

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this is awesome.im very thankful

[@amatore6]

I'm a person without math who has for many years struggled to understand QM and especially the Wave Function. I wish I would have started with this video. From this video I now understand much better what a "function" is and does. I knew that sine and cosine had to be involved in the equation, but now I understand how. I would imagine the QM Wave Function is similar but with more than just x and t involved, such as p, and I know that it is "complex." My goal is to understand how the WF predicts the future state of the quantum particle. This video is a huge help, and I have watched many.

[@nastarankianersi104]

I watched this video to try to understand electromagnetic waves. I'm not sure if I had really understood the concept of waves in high school but I absolutely understood now! Thank you so much!

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understood nothing out of my textbook intuitively but now i clearly understood this

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Just beautiful... Amazing... Wonderful... Just Khan academy 👏👏👏👏👏

[@masudraihan6905]

What a beautiful explanation!!khan academy is really doing a great job....it helped me a lot for visualising and realistic feeling about how a wave propagates...A big thanks to Salman khan for having such greatful tuitors...

[@nataliabacic]

Thank you for explaining everything. Even the intro, where you define y(x,t), was very helpful.

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Superb bro I never expected to maths be understandable but my vision got changed after watching your vid😊

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man wtf ....... so intuitiv and simple... best explanation i've ever seen. thanksss :)

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Alhamdulillah, I have felt this matter in this video.

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anaHr ?

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Awesome stuff! Much more fun than college basics - more freedom.

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Yah!!

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You're an awesome teacher. Thank you for sharing your knowledge.

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Ohhh, my Gooooooosh!!!! Finally I understood what this equation means! I'm learning physics at uni, I'm in the 3rd semester and I just now understood that what I have already 'learned'. You are awesome!

[@aksharaverma880]

So you are telling me that after studying all this stuff in 11th grade currently, we have to do everything all over again at uni??!!! Nooooooo..

[@matemol4880]

@@aksharaverma880 Yes, but you are learning all the stuff from an another point of view and you will go much deeper into the meaning of the equations. You will enjoy it, if u study hard. This is my experience. If you are lazy and don't give a shit, than physics at uni is going to be a nightmare, you will suffer and die. :DD

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I am so so so grateful for this amazing amazing amazing awesome explanation . It's the best channel 💕💕💕💕

[@anshumaningale06]

Even a 10 th class student can understand this very properly explained thank you sir😊

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Thank you so much sir for this video it made me clear about wave equation

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Sir l like your way of teaching thanks for this video with respect you have helped me so much

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Diamond of an explanation...

[@vir_6282]

I can understand this in 6th grade... amazing explanation

[@RealEverythingComputers]

This video really helped me understand wave functions! Thanks!

[@waseemakhtar8981]

Good way of explanation

[@mxame]

Thank you for this cool explanation !

[@MrMrannoying]

I love this explanation! My textbook and Teacher used this other way of getting the argument for the cos/sine. After establishing the wavelength and its relation to the distance it then used cos[2pi/wavelength(x-vt)], to establish how it shifted over time due to velocity. After that, the velocity was changed into terms of wavelength and period. yada yada. I enjoy your video a lot more though!

[@Mulkek]

Thanks, and it's so easy & simple!

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This is the best explanation ever

[@B__ArnavSingh]

very nice really impressed

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sorry my teacher.. but u have to learn this! man u are just awesome.. thanks for helping thousands around the world

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this is really helpful.the explanation is on point

[@nagrajkv5152]

Thank you very much. excellent presentation...

[@GaneshReddy9]

This is the best video of wave equation I have ever seen thanks a lot

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this is the best explanation I've seen on this topic

[@csywf]

It is Soooooo simple and beautiful I really wanna thank youuuu... This is the best explanation!

[@MrArlenBrazill]

I could have used this explanation in physics. I don't see how this video could possibly be any better.

[@MayankGoel447]

This is the best explanation of waves. Now I get actually understand what it actually means. David can you please tell why does waves moves to the right because of minus sign

[@subashkandel8116]

Its operation of functions..

[@justanotherguy469]

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wish u were my physics teacher....lecture wouldn't be that boring

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Amazing! Thank you! I got it!

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thank you for saving my life

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Spent 4 years in college and now I finally understand high school math thanks so much😅

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This is phenomenal

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God has given you a natural talent for teaching! The best explanation of a wave equation by far.

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thank you soo much!!!!!!!

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Thank you sir

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thank you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! you can't imagine how grateful I am!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

[@MS-sm6oj]

This was well-explained. Good job

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Thanks for everything.

[@daweihuang4606]

This video provides a very great explanation, probably the best physics video i watched this year

[@line8748]

Great explanation! Thank you very much.

[@DavidKasanga-kq8ex]

Profound explanation

[@deadpool-wp1eq]

Who is the lecturer? Sir you have done a really good job. I would like to sincerely thank you for your great work.

[@wssz112]

thanks now i know why there is x and t, also what wave number is.

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Thank you!!!!! This makes so much more sense now.

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You're a Lifesaver

[@honestman276]

Thanks. From Bangladesh.

[@jonassmidt7534]

Insanely good explained!

[@decaybeats]

Quick and easy to understand explanation, thank you!

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Wonderful explanation David 👍

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How did people graduate before youtube?

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Dude I too think the same

[@fisicraft]

It helped a lot thanks!

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I couldn't be more grateful. You're awesome ❤️

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Very good explanation hatts off sir

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Imagine this is your school. Your classes are short and easy to understand. School is now a chore and not a no-wage job.

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Now I won't have to worry about getting this topic wrong