8.02x - Lect 26 Traveling Waves, Standing Waves, Musical Instruments
ฝัง
- เผยแพร่เมื่อ 13 ก.พ. 2015
- Traveling Waves, Standing Waves, Resonances, String Instruments, Wind Instruments, Musical Instruments
Lecture Notes, Oscillating Sound Cavities - Fundamentals of Wind Instruments: freepdfhosting.com/e79d2b1fa9.pdf
Assignments Lecture 26, 27 and 28: freepdfhosting.com/20495b808e.pdf
Solutions Lecture 26, 27 and 28: freepdfhosting.com/7759a06b8d.pdf - วิทยาศาสตร์และเทคโนโลยี
This website contains all my 94 course lectures (8.01, 8.02 and 8.03) with improved resolution. They also include all my homework problem sets, my exams and the solutions. Also included are lecture notes and 143 short videos in which I discuss basic problems.
ENJOY!
Lectures by Walter Lewin. They will make you ♥ Physics. Thanks
❤❤❤❤
26:27
Then it gets to the brains, if there are any.
🤣🤣🤣🤣
Lectures by Walter Lewin. They will make you ♥ Physics. Thanks
This is the most beautiful presentation ever. For the first time I realize that a standing wave is nothing more than a cosine modulating the amplitude of a sine wave. Amazing. I love you!
:)
@Za Yn you should mention india not kashmir we need to represent our country not unionterritory
@@sudhamshreddy2756 I guess he has deleted his comment
@@sudhamshreddy2756 bro why are you Indians so wierd. Always saying love from India. It’s not that deep
@@lukaide6359 love you from india🇮🇳🇮🇳🇮🇳
You actually made me fall in love with Physics. You are the Legend, Sir!
"Sound" sounds very very interesting because of YOU, Sir.......
:)
Sir you explained standing waves to me! My physics teacher had confused me. Thank you so much!! You are the best physics teacher I will ever see. I KNOW IT
😊
The simple mention of the fact that, in the standing wave equation, the spatial and temporal information is not interlinked makes for a great tool for understanding how standing waves aren't being shifted left or right (speaking purely in terms of vertical vs. horizontal displacement).
Excellent explanation of the standing wave professor. Thank you!
I usually find animation more helpful to understand. But animation are nothing compared to these practical examples. You are a legend :).
I honestly have reconsider many times going on in my University in Italy since I had no problem in mathematics but Physics was making me bored, at a point that I was going to Economics and Politics because it were more real to me.
Thanks is not enough professor, if you'll come back to Europe one day and make a trip in Venice, I'll be the one unveloping the red carpet all over Venice.
My next-to-be AeroSpace Engineering Degree is largely becaming a dream come true thanks to you Professor, you made me interested again in Physics and the applications it has.
This is the first Walter Lewin lecture I have ever seen and this is the best lecture I came across in my entire life. Now I know why you are famous :D
Cheers from India! ❤❤❤
:)
Blessed to witness these lectures, sir! It gives me eternal happiness
I will never forget you Professor Walter Lewin. You are the only physicist that taught Physics with great care and thoroughness in terms concept. Your demonstration proves extremely valuable that registers in my mind. I thank God for your life, and contribution to teaching physics in a way that makes me appreciate and love Physics. You enlightened me of all the topics that I didn’t really understand the concept well, or sometimes not at all because of lack of faculty by others. You are such a gift in the world of Physics. Thank you Professor 🙏.
well the last 2 min were really appreciable,he can do anything for physics awesome professor👍👍👍👍
Dr. Lewin, I've watched several of your lectures since the start of my first year in my physics major and I just wanted to take the time today to thank you for all your dedication you put into these lectures. Thank you for your amazing teaching and making me love physics.
+Enrique Morell Thanks Enrique for your kind words.
This was like rediscovering musical instruments. Thank you so much.
Thank You Professor... These lectures are amazing
Great teaching!. This is the way in which Physics/Math should be taught.
The best demonstration sir. So glad, that me could travel back in time to see your lectures sitting in my home from India
❤
Beautiful, simple and very instructive Demonstration of standing wave with that rope.
You are an incredible teacher and a wonderful human being. You involved your students in the lecture and gave them a chance to demonstrate their talents to everyone. Very rarely is this the case - most teachers are content showing off their own talents (if even that). I will remember this lesson - to give others the chance to impress me - because you never know what amazing talents people have hidden.
For the first time I have understood x-vt concept. Thanks a ton great sir... love you.
I love you sir. May you never stop teaching.
✨learning, performing, playing & even listening to music over1/2 my life & I now know I never really understood music ! Actually I may/ will need watch this again & possibly again😬🤫😁
Thank you Sir! ✨
sir,i'm a student of class 11. I regularly follow your lecture and your teaching come alive to me. I love u sir as well as Physics. Huge respect and love from BANGLADESH.
Superb dedication Professor. Love from India ❤
Thanks Professor Lewin you make your lectures very interesting. Thus makes us love physics.
Many Thank You for the Great job you have done! Probably the only clear explanation (at least for me) of the standing waves that I have come across. Bless you!
You're very welcome!
This lecture is absolutely beautiful.
Thank you sir.
So far I was wondering how the standing wave phenomenon possible. My mind was a mess. Now it's cristal clear how this bizarre thing happens. Thank you so much professor. I love you so much ♥️♥️♥️
Enjoyed a lot this lecture while learning!❤️
It’s been years since ny last Physics class. This vid reminded me how much I love this stuff! Thanks!
You're very welcome!
beautifully orchestrated by the great Professor Lewin!
Thanks for listening
his lectures always recover my passion for physics again after weeks of unintuitive lessons from my physics class
Wow! Very wonderful playing of ysaye’s third sonata by the student.
After i watched this lecture i downloaded a software oscilloscope(for microphone) and a frequency generator and i am testing various frequency's and harmonics to find nodes and i am sliding with my chair slowly away from the speakers to find nodes ..its really fun when i find a node i feel a drop in pressure..its been 2 hours i have been doing this LOL and not bored at all! thankyou prof. lewin
could you please share the source to download the software? I would really appreciate it. I too am interested in trying it on my piano and having some fun
Thnx a lot :)
Amazing teaching style
Love you sir This made my day 😍😍
Best sir. this kind of visitation not seen and"herd,😀" before I would really really really really like to learn from you
I like the way you tie the mathematics to physical demonstrations. It is all to easy to to get lost in mathematics and lose sight of the physics.
You are true inspiration..what a extremely well thought lecture...genius,,omg
Wow, thank you
I am so enlightened to watch this lecture video of the Doctor, Walter Lewin.
I feel like studying physics .
The most beautiful video❤️
really amazing lecture.
I didn't understood these when my physics teacher thought us this . He just wrote bunch of equations that and no one listen to him .
Now i am foing all these again and hopeful to find your lecture ( I am preparing for jee so i am reading all thses)
Excellent
absolutely wonderful
Beautiful!
Beautiful sin function you drew. Those aren't easy to draw.
Wonderful- a treasure.
Nothing can be better than this
Thanks for the practical explanation! My teacher didn't explain me exactly what it's physical meaning is...
This teacher can inspire anyone to learn physics. I myself am inspired by him. This is my channel about Science.
Very impressive!!!
Wow! With this teacher everyone would want to be a physicist!
You are definitely a GENIUS
:)
Awesome lecture!!!
Glad you liked it!
Violinist at 43:35 played Ysaye's 3rd sonata.
Love you sir .... ☺️
First of all. These lectures are simply beeaautiful. Thank you for making them aviable for everyone. In the aparatus shown, the fact that the waves are aparently static is due to a recognition of the machine of the frequency of the particular wave?
Thank you for these amazing classes ❣️😊❣️
You're so welcome!
Sir, you are more than amazing.your presentation made me love physics.❤️❤️❤️❤️❤️❤️❤️
Glad to hear that
@@lecturesbywalterlewin.they9259 feeling so amazing that a great person chatted with me .🥳🥳
Thank you professor.
Great Lecture Professor!
+Fabrizio Tabasso Thank you!
perfect lecture
This is so beautiful. God damnit. Why are you so marvellous! Unbelievable. My hero forever !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
:)
Best presentation professor
Glad you think so!
You pick a 4 unique music instruments based by its special point. I interest in the swinging string and the instrument that produce low-tone sound as it is work like ancient music instrument, we use string pundulum and metal another one sound like some kind of shell (hard to find for a perfect voice).
I love you man. you are the teacher who have understood the depth of conceptions. i really learn from your videos and i appreciate you😍😍😍
thanks for your kind words
35:03 third harmonic actually because the interval with the next one is a fourth. And 35:18 is the second harmonic because the interval with the harmonic above it is a fifth.
Anyone else notice that he played Epona's song from The Legend of Zelda Ocarina of Time at 33:50?
you think he did that on purpose? XD
Probably accidental. I could be wrong though!
Watch this Lecture and listen to Kind of Blue. Preferably at the same time.
Thank you, professor!
You are welcome!
After filling lakhs of fees, real knowledge is found on TH-cam for free.❤️
Very good lecture Sir. Thanks and Regards 🙏🙏🙏🙏🙏
Most welcome
Wow I had a doubt about harmonics and standing waves I came here and it got resolved thanks!!
super!!!
@@lecturesbywalterlewin.they9259 oh my god you replied so quick!! I love you Walter lewin sir!! Only if I could meet you and talk to you!!!
Thanks for the lecture Sir!
Most welcome!
Terrific!!!
Amazing lecture
Thanks a lot!
Came here to learn actual meaning phase. Thanks sir walter
35:27 how did u estimate the numerical values of frequency in Hz sir? Absolutely mindblowing
Beautiful
Woww.
Professor Walter Lewin changed his voice more sweeter than my Girlfriend..❣️
Amazing amazing amazing
31:37 that’s some useful information even outside of music and physics ;)
I like this. this is cool
sir you're best 😂 ♥
6:00 sir how is wave exactly as 2sin3(x-6t) getting produced even if the source is also moving horizontally?
amazing! 👏👏👏
Thank you!!
This will help to clear iit jee🙏🙏🙏
What's the piece's name played by the saxophone ?
Thanks prof
thank u soo much
Sir , will the amplitude of the standing wave change for different resonance frequencies ?
Thank you sir
In reed based woodwinds instruments, e.g. clarinet or saxophone, if one blowconstantly on a note, theb open the register hole which eliminate the fubdamental freq so you get a note in hugher octave but then you close the hole and magically you do not get the low fundamental as long as you continue blowing air in. Only when one stops and dtart again the low fundamental freq appears again. I wonder why?
thank u prof
33:48 why does the flute have a whistle type opening at beginning and not just a hole?
i am a bangladeshi student and i nevet learn it like this thank you so much sir btw i am a physics lover too
:)
Is this a university course? My school taught us at 11grade
Sound was very boring for me but because of you it is interesting
Really your lectures make love physics
may I ask what piece of music was tom playing on his violin? at 43:31 it sounds beautiful.
Ysaye violin sonata, I'm almost sure that it is n°3
nice, thank you very much! :)
Had to tune the violin everyday in wisconsin!
Hello, Professor Lewin. My textbook used cosine to represent standing wave instead of sine. So, y1 + y2 = 2ysin(kx)sin(wt). I felt confused. Are they the same? Can you explain it to me?
+JunYu Lei If the string is closed at both sides, then at x=0 and at x=L the displacement must always be zero. As long as your solution meets those conditions it does not matter whether you have sin or cos.
If the string is closed at one end but open at x=L, then your solution should give a displacement of 0 at x=0 at all times and dy/dx must be zero at all times. As long as your solution meets those conditions it does not matter whether you have sin or cos.
so many happiness
Sir here why you take moving graph firstly and how you thought that for positive x direction we should take minus t and vice-versa?....