Standing waves on strings | Physics | Khan Academy

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You make lives of students very easy all around the world and we cannot ever explain in words how much you mean to all of us.

[@Randiiii]

Oh my gosh, i dont know why it was so hard for me to understand this concept when my teacher taught it, probably because i was half asleep, but you've made it so easy to understand through this video. Thank you so much, i loved the way you explained it!

[@mrjollyguy25]

Honestly why can't physics professors teach like this?

[@hussam9044]

They do...

[@FaizaanDatoo]

They're teaching on their feet

[@geico105]

Because they take the things they’ve mastered for granted.

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They do but it's the students who don't concentrate because its not a video and it's long

[@hikariwuff]

YES

[@wanzhuzhao9439]

I was thoroughly confused after lecture today and I am so glad to have found this video, it was not that complicated

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Jinnie Tinianow lol just imagine if your teacher saw your comment :,)

[@wanzhuzhao9439]

lol, i think it's more because of communication styles. My professor was actually pretty good once you get use to the style, but we covered this in the beginning of the semesters and I didn't understand her at all.

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Jinnie Tinianow yeah,some teachers like this one they know exactly how to teach every student ,thats the skill!

[@hussam9044]

Wait you take this stuff in college? I was just watching this video so I can do my retake exams, I am still in private school... How deep does Cambridge teach it's students? I am just an overseas student studying in a British system Under Cambridge. My class is called 12 AL (Advanced Level). That's what Cambridge calls us, AS and A Level students...

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@@hussam9044 University level physics is much harder than this.

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Thank you Khan Academy... You make life way more simple... Love you...😍😍😍

[@xiaoyu3644]

Finally a guy who knows how to explain things! BEST TEACHER AWARD. Sick of people who are like this is this and that is that but dont explain how it works. So you explained well thank you.

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“This guy is the big daddy”

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scrub 8 think you should reconsider about what u said ... 😂😂😂😂

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This is the comment I was looking for 😂

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I can not help laughing

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Amen

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Dont forget "alpha guy" 😂

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David, I exclusively watch your physics videos. No one can match your teaching ability. Thank you and you're welcome.

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I can not thank enough to Khan Academy as a whole, when I see a video from Khan Academy exists about the subject I am trying to learn, I become relieved. A black background with colorfoul lines on it never became this good.

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I can honestly tell you that if I become the next Stephen Hawking, I will credit you as I receive my Nobel prize.

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Sooodarncrazy But, Stephen Hawking doesn't won Nobel!

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@@annoyingfelix5873 So! I hope you will understand it!

[@ashishkumarjha3851]

@Kat Thanks Kat

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I will think about nobel Prize later and use this to clear my entrances first 😅

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Thanks a lot Sir. I can try solving more questions! As my basic is clear now! Ur 13 min. Saved my 1 hour. Once again thanks for this amazing session 🙏

[@eroneous3917]

Much simpler than I thought. You made this very easy to digest. Thanks! Now everybody in the comments section do the wave👋! Lol😁

[@ashishgurung1417]

2 minutes into the video and i know this is going to be great . Thank u for such simplified and beautiful content

[@08athakwaninandish16]

भौतिकी के इस विषय का काफि अच्छा विवरण देने के लिए शुक्रिया! ⭐️ Thanks mann, for the explicit explanation of this concept of Physics ! ⭐️

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this is great education man im in grade 7 but i know this will help thank you!!

[@jamesursilvano4618]

Good day to the uploader ! I really want to GIVE A LOT OF THANKS to you ! I am a newly Physics teacher ( although I am a Math Major Graduate) from Philippines. Your videos really help me in my teaching and understand a lot more about physics. Thanks a lot sir, and GOD BLESS !

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good luck on yr journey.

[@mt479]

So smooth, so understanding, so beautifully demonstrated.

[@beatsme3146]

You explained something my modules can't. It literally asks me to hum at the frequency of an electric fan and write my observations. How am I supposed to write my observations when It didn't explain what concept of physics should I base my observations on? I don't want my answer to sound ridiculous and irrelevant to standing waves and so I searched this. Glad it helped a lot.

[@kyubeenkim9360]

OMG, lifesaver - thank you so much for the video

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tbh David Santo Pietro is the best in all of khan academy in terms of his ability to explain

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you're a great theacher thanks a lot

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This is the best lecture that I've ever heared.

[@farn451]

I suffer from Dyscalculia and I'm a sound engineer so I kind of need to understand this stuff but I've been wrestling with a way to get my head into it. This was clear and even though your peppered it with math's I followed it and it made perfect sense. Thank you!

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We need more of this style of teaching for everything study, at least online.

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The "day before the exam" studying moment

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Best video hands down on this topic on KZbin!

[@spectral282mcoc]

Dancing Waves concept is easy. Thanks to you sir!

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one of the simplest presentation on this topic.thanks khan academy..keep posting this type of videos.

[@yizhan232]

When I was listening my teachers lecture it was too tough to understand, but you taught it with fun. woah, this concept is actually very easy to understand . thank you

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Finally someone who actually makes it possible to understand this.

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So helpful! Failed a quiz and didnt know what i did wrong... this made it so much easier!

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This is the best possible explanation.

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Best explanation I've heard

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I hate topic of waves so much. But u make it look like so much fun to learn......thanks sir. 💕

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I like many others here were also quite confused before I came here. Thanks so much!

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So much better than my real physics teacher. I struggled to learn that In class than here which was so much easier.

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Extremely common khan academy W

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Upvoted because "dancing wave" xD

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Thanks, I love chemistry, after watching these videos

[@Amethystb.06]

This was a perfect explanation, thank you!

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Yes that was a complete discussions I was hoping for. Thanks sir

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You explained this really well, props for helping me get this concept!

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thanks alot finally got it😁😁🙌

[@radintelect157]

Thanks, for this extremely good explanation.

[@xhuliomyftari8039]

What an awesome video !! Way better understanding of the standing waves. Great job man

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Awesome video! Thanks for the great explanation!

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Bro has descended from heaven with this one

[@thefirespectrum]

Simply wonderful explanation.

[@alexfontaine6233]

from 9:00 minutes on why didn't you just show the equation for wavelength lambda=(2L)/n instead of making it more complicated

[@vanshsingh608]

nice explanation for the danci- i mean standing waves

[@zynex9250]

Thank you man

[@DynamicMusicArtist]

Thank you very much, this has really helped with my studies!

[@anthonyrojas9989]

Great explanation. Thank you

[@faithabike664]

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[@anujupadhyay7210]

it was really very helpful

[@sammywilkins3438]

Super awesome! Helped me grasp the constructive and destructive concepts a lot more! I also thought it might be nice to note, that the velocity of each harmonic is the same, because λ_n=2L/n ,f_n=nV/2L,and V=λf, so V_n=2L/n* nV/2L=λ_n f_n. I know you didn't talk about velocity so it probably wasn't relevant, I just thought that it was super interesting and cool!

[@tadeassimunek3516]

Thank you, well explained!

[@anuraggupta5988]

Helped me a lot

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thanks for your teacher and students

[@iliTheFallen]

Great explanation. Bravo! and Thanks!

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saved my life, thank uuu!

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He explained it so well

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Man, you are a life saver!! Thank you

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Thanks, it was helpful.

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Very good tutorial

[@athiest100]

Thank you ❤

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Very nice you haven't Wasted your time n money in institutes

[@faris3604]

thank you david

[@shivaniits]

Great explanation 👍🏻

[@unimalik8988]

when the wave reflect from the boundry (i.e from rare to the denser medium)it reflects at angle of 180 so it should be a destructive interference ...so how the antinodes r formed ??

[@Kyle_da_athlete]

Uni Malik exactly this is the same question I'm asking

[@pawankhanal8007]

I can't wrap my head around it. Same problem

[@rajaramanbaruah9798]

Interference occurs only when the waves simultaneously pass through that point in the string, and since a wave before and after reflecting is never simultaneous, so therefore its not a destructive interference.

[@MuhammadTahir-bl9uv]

Destructive interference does not occur. A wave is made up of crest and trough. Let's assume that crest is leading the trough, and therefore it will be reflected first by the anti node. When the crest is reflected. It is inverted. And the inverted form of crest is trough. And already, another trough was coming behind the crest. So two troughs reinforce each other.

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@@MuhammadTahir-bl9uv I was looking for an explanation to this and at first your explanation looked confusing but after reading it again, you have managed to get me to completely wrap my head around it, thank you very much!!!!

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Awesome! Thanks!

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thank you! Finally I actually understand something! :)

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This chapter messed me up in school, but you explained it so clearly. Thank you so much!

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[@kabouch]

4:44 L in this example should be representing λ/2 since it is a half cycle with a crest (maximum)only, shouldn't it?

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2:24 my man caught lacking

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I love you dude!

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This video saved my grades

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wow I actually learned something

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never realized how much i needed a physics teacher who refered to the fundamental wavelength as "big daddy" until today

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I can't believe I am enjoying physics....in high school it was a headache