Doppler effect: reflection off a moving object | Physics | Khan Academy

[@BidwatRajPokhrel]

You know you are a nerd when you start calculating the change in frequency of your scream when a door is coming towards you at 30kmph.

[@Maddie05007]

Thank you! I got the "feel" of the concept here. Now I can solve my problem easily.

[@АндрейОнищенко-з8х]

Your example was really amusing)) Hahaha)))

[@haotian7843]

I really really love your explanations Ty

[@xshixaliyeva]

Awesome example

[@parshvagogri5546]

nicely explained! good work man :-)

[@hussain7md166]

You’re great. Thank you

[@saniamajid9311]

love you Mr Khan

[@dassaf5374]

could you please explain how you calculated the (Vs/(Vs+-Vd))? why is it the reciprocal?

[@mdneyaz305]

Dassa F in 2nd case the door is acting as a source and man is acting as an observer.therefore Vo=0 is taken because man is at rest

[@nononnomonohjghdgdshrsrhsjgd]

Thanks, i finally understood it. In fact the explanation is clear. Neighbors making noise at 11:22 p.m. and 4:32 a.m. are not.

[@동동동-x9b]

Liked this shit. Awesome.

[@Anonymous-ym4tb]

u are the best

[@samuelayodele2309]

Thanks so much.

[@andoan4510]

just want to acknowledge the scenario......

[@seannyamutenha9907]

Why do you have to multiply by a factor

[@mariyamshifhyna2567]

i would strongly recommend the author of this video to revise their Doppler shift notes - the calculations parts

[@VickiBee]

I used to work in cardiology as an ECG Technician. We had a person who did Echocardiograms. She was a Cardiac Technician. That's what I was trying to be before I decided that PRE-hospital Care was where I belong. Where most doctors aren't. Cardiologists are a different type of doctor. Dr. Cook was right when he said they talk to you any way they please and you have to get used to it. I was able to do that in Prehospital but not In-hospital care. I understand EMP's.

[@Revion91]

this dude is hilarious

[@pradyuman9151]

but what if all this i happening in a train or on a windy day?

[@AfalseNotfalseQueen]

David you got the formula for frequency and period mixed up

[@Maddie05007]

Nope. It's correct

[@jonathansum9084]

The video lecture is unclear. I solved this problem detailly. Review for solving: photos.app.goo.gl/GtOkNQvFlyQgVpJ93 Soultion: photos.app.goo.gl/UxqAopG6UN53juzg2

[@muhammedtai6282]

btw... isn't that the equation for the period... I think you forgot to take an inverse of it. or the other video from khan academy was wrong....now I'm confused

[@sahildoshi5247]

me too.....damn this man confused the hell out of me

[@na-chan163]

and im here laughing at a youtube vid years ago lmao its too funny

[@archiedunn8566]

The best

[@andresitososa123]

terrible