Doppler Effect and Shock Waves HD

[MILOPKM]

A little annotation would have done any harm. Such as denoting

- Subsonic for the 1st flight.

- Transonic flow for 2nd

- Sonic for 3rd

[ponderainnovation]

Hi, its really cool what we contribute. I'm doing the same thing

[ultrasonictechnology]

thanks for explaining

[StandingRedPanda]

Whoa! I finally found a science video without someone arguing about religion :D

But anyway, I have never seen how shockwaves travel when the jet goes faster than the sound. This is fun! So if you would be in front of the jet, you wouldn't hear it at all.

[zmailzzz]

but I can move faster than the right.

[AnnihilatorCZ]

@zmailzzz Wzum wzum wzum!

[xCRsoccerboy]

i understand it

[solidbeaver]

i suck at these kinds of stuff :/

[YourLoveSerenade]

would the sound sound reversed coming from supersonic thing???

[KALEIDOSCOPEN]

can an old railroad track continue to hold electricirical charge(?) in rain or tornado, even while operation on the tracks is suspended

[ladiestreat27]

what if you cruising behind the plane while the jet is going supersonic speeds, would you hear high and low frequency at the same time? if so, what does that sound like?

[physicsanimations]

@ladiestreat27

If source is moving away from the stationary observer, then f_d=f / (1+v/u), where u is the velocity of the waves, v is the velocity of jet, f is initial frequency.

[ladiestreat27]

why are the waves not at the front of the plane during transonic speeds? or while traveling speed of sound.

[2129261184]

@ladiestreat27 Ahhhh....because your travelling faster than sound LOL

[c03rcion]

@ladiestreat27 when the speed of the source of the sound waves (the jet) exceeds the rate at which the waves generated by the source propagate through a medium (the atmosphere), the waves can not out pace the jet (the source) because it is faster. thats why the waves seem to bend at the nose of the aircraft, creating a "cone" image. Its analgous to a fast moving boat leaving a wake in the water. The speed of the boat out paces the rate at which the waves generated by the boat propagate in water.

[ladiestreat27]

@c03rcion so if the plane exceeds speed of sound, cruises for a couple seconds, so a good sonice boom is formed, then it slows down. wouldnt that sonic boom or at least that bunch of sound waves close together hit the plane once it goes subsonic???

[c03rcion]

@ladiestreat27 watch at 0:48. Now imagine if the jet lowered its velocity by 50% at time 0:52.

[ladiestreat27]

@c03rcion so the pilot will hear the sound but not the boom since it is going outwards yup i get it now.

[ELOA23]

@ladiestreat27 yes, that's what happens when the aircraft would reach the speed of sound again, but the mach cone it produced while supersonic wouldn't hit it because the "sonic boom" doesn't move on its own and is created by the airplane.

[ladiestreat27]

@ELOA23 i finally got it. there is no sonic boom that can hit the plane since it moves in all directions AWAY from the plane. so no matter what the plane does, it cannot be hit by the sonic boom. (unless it over shot the sonic boom to the left or right and waited for it to reach it again but that is not realistic.)

[aakashmishraa]

this is really nice demo, its quite easy to understand doppler effect vth it, thanks

[biscottie83]

this is the animation that helps u see how a fast moving object and the sound interacts ..(the circles are sound waves)

first plane, slower than the sound..

second plane, braking the sound barrier

third plane, faster than the sound

[EurofighterVsRaptor]

huh?

[ad030003]

なんかすごい。けど、なんだこれ？

[goboogle]

woooooooooooooooHHHHHHHHHHHHdi­yhwqdi

[piratenu1]

wow nice !!!!!!!!!!!!!!!!!!!!!!!!

[hellokitty782009]

I don't get it.