Sound travels at 343.59 m/s , light travels at almost a million times that. So could we hear music at light speed?

The transmission can be at light speed (radio?). To hear it, the signal has to be converted to sound (listen to radio?).

@OP: If you mean literally traveling at the speed of light then that is not possible. If you simply mean if you can hear when traveling faster than the speed of sound, then the answer is yes, as the air on the plane is moving with you.

The transmission can be at light speed (radio?).

 

Or laser.

 

Or laser.

Laser beams are not modulated, so it would be difficult to transmit sound.

Laser beams are not modulated, so it would be difficult to transmit sound.

 

Some lasers are quite easily modulated. I've done this — sent music across the lab as a demo. A few kHz on a laser diode (pretty simple to do, modulating the current) and picked up on an AC-coupled photodiode. Fed into a boom box.

 

Alternately, you send the light through a modulator (electro-optic or acousto-optic) and modulate the beam that way. Being able to modulate the light is necessary for servo-locking schemes, among other applications.

Hey aren't you paid to be working on atomic clocks ?

Not fooling around with lasers and making music on a boom-box across the room.

 

What, are you trying to impress a girl or something ?

Being able to modulate the light is necessary for servo-locking schemes, among other applications.

 

Optical fibre [fiber] communications was the first thing that came to my kind.

 

Optical fibre [fiber] communications was the first thing that came to my kind.

 

That's often digital, and I was thinking analog.

Hey aren't you paid to be working on atomic clocks ?

Not fooling around with lasers and making music on a boom-box across the room.

 

What, are you trying to impress a girl or something ?

 

It was grad school, and we were doing a demo for the teenage students who were visiting for summer science camp. They were, unfortunately, thoroughly unimpressed.

 

That's often digital, and I was thinking analog.

 

Ah, yes. Good point. (Does turning on and off count as modulation? )