Doppler Effect with Car Horn

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Doppler Effect with Car Horn

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Harvard Natural Sciences Lecture Demonstrations

Күн бұрын

Пікірлер: 28

@Gretchaninov 3 жыл бұрын

I used this for my Year 11 physics class. We estimated the frequencies of the horn before and after as 390Hz and 350Hz and calculated the speed of the car as about 66km/h using the Doppler effect formulas.

@NatSciDemos 3 жыл бұрын

Pretty good!

@rapperpankajsingh2880 2 жыл бұрын

F'=(330+-vO)/(330-Vs) F sorry don't know too much i am medical NEET aspirant

@gohilramdevrajeshbhai5254 2 жыл бұрын

I too did this but I found his speed as around 73 miles/hour (33m/s) . Horn frequency when at rest is 355Hz. Max frequency detected was 393Hz. Minimum frequency detected was 343 Hz. Taking speed of sound as 343 m/s, the results says he was lying and driving at faster speed. The discrepancies can also be due to my view that he was not driving at constant speed but rather accelerating and retarding! Geek!

@Gretchaninov 2 жыл бұрын

@@gohilramdevrajeshbhai5254 The 355Hz figure is for when the car is moving away, not at rest. Whether the car was accelerating or not, it couldn't change much speed from just before and just after it passes the camera and the sound changes. You can still get a good estimate of the speed from that. And it seems clear that its speed isn't changing much from the video.

@Humongous_Pig_Benis 3 жыл бұрын

Don't *EVER* cut the way of a Physics Engineer while driving, he will blast his Doppler gun at your hears!

@joemicka5222 3 жыл бұрын

This is the first time I have noticed it so clearly, very cool!

@MrFerrari458gto 3 жыл бұрын

Poor dood running probably like wtf😂

@Humongous_Pig_Benis 3 жыл бұрын

Harvard has just peer reviewed my lifetime research as a car driver.

@GatoAstronauta 3 жыл бұрын

*"Yeah, Science!!!"* 👏🏽👌🏾👍🏼

@ThuNguyen-jy2jt Жыл бұрын

this guy needs to get more views. this quality is on par with some of the biggest vlogging youtubers. great educational video too.

@gregbernstein7524 3 жыл бұрын

"Stunt Driver"

@bratishka3082 2 жыл бұрын

Yes, I can see Dopler effect. There is obvious blueshift in car roadlights

@ProfAndrey 5 ай бұрын

0:26 Stationary horn 0:48 Moving horn

@lincolnkarim1 Жыл бұрын

The Doppler Effect and Stockholm Syndrome all in one package.

@abpccpba Жыл бұрын

Where is the Train? 🙂

@Humongous_Pig_Benis 3 жыл бұрын

If you suffer from road rage, you might qualify to study Physics!

@exiledproductions956 Ай бұрын

Would that sound different if the horn was in the back of the car? In a way I know it wouldn't but it seems like it would at the same time. So....???

@NatSciDemos Ай бұрын

It would sound the same.

@exiledproductions956 Ай бұрын

@@NatSciDemos so the dopler effect is from the noise getting closer and further not where the sound is necessarily happening?

@user-sr6pi5lp3q 10 ай бұрын

Car speed?

@Cryptic_Triptych 3 жыл бұрын

Can you please mount the horn on the rear of the car, facing away from the car, and do this experiment again?

@coar 3 жыл бұрын

Are you reviewer #2?

@sandhyarahangdale6457 10 ай бұрын

0:49

@aclshopper1392 2 жыл бұрын

Bro

@Geotrax2 2 жыл бұрын

Sound go slow down

@highbloxplayz7186 3 жыл бұрын

When you have nothing to do but waste your time be like:

@pyro934 3 жыл бұрын

When you’re a kid be like: