TheoreticalCheckmate Posted June 24, 2015 Share Posted June 24, 2015 Sound travels at 343.59 m/s , light travels at almost a million times that. So could we hear music at light speed? Link to comment Share on other sites More sharing options...
mathematic Posted June 24, 2015 Share Posted June 24, 2015 The transmission can be at light speed (radio?). To hear it, the signal has to be converted to sound (listen to radio?). Link to comment Share on other sites More sharing options...
Endy0816 Posted June 25, 2015 Share Posted June 25, 2015 @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. Link to comment Share on other sites More sharing options...
swansont Posted June 25, 2015 Share Posted June 25, 2015 The transmission can be at light speed (radio?). Or laser. Link to comment Share on other sites More sharing options...
mathematic Posted June 25, 2015 Share Posted June 25, 2015 Or laser. Laser beams are not modulated, so it would be difficult to transmit sound. Link to comment Share on other sites More sharing options...
swansont Posted June 25, 2015 Share Posted June 25, 2015 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. 1 Link to comment Share on other sites More sharing options...
MigL Posted June 29, 2015 Share Posted June 29, 2015 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 ? 1 Link to comment Share on other sites More sharing options...
Strange Posted June 29, 2015 Share Posted June 29, 2015 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. Link to comment Share on other sites More sharing options...
swansont Posted June 29, 2015 Share Posted June 29, 2015 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. 1 Link to comment Share on other sites More sharing options...
Strange Posted June 29, 2015 Share Posted June 29, 2015 That's often digital, and I was thinking analog. Ah, yes. Good point. (Does turning on and off count as modulation? ) Link to comment Share on other sites More sharing options...
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