The speed of sound and The speed of Light

AI Thread Summary
Traveling faster than the speed of sound results in not hearing sounds from behind, but inside a plane, sound travels normally due to the air moving with the plane. In contrast, if one could hypothetically exceed the speed of light, they would not see anything ahead, as light from those objects would not reach them. However, it is currently impossible to travel faster than light, making such scenarios purely theoretical. Approaching the speed of light leads to interesting effects, such as changes in the spectrum of visible light. Overall, discussions on exceeding light speed remain speculative and lack practical implications.
timejim
Messages
42
Reaction score
0
If you travel faster than the spped of sound, then you do not hear anything. If you were to travel faster than the speed of light, then you would NOT see anything.?
 
Science news on Phys.org
Greetings !

Theoreticly - yes. However, it is impossible to travel
faster than the speed of light. Nevertheless, lots
of cool things happen as you get close to it - you
see the things behind you in a higher spectrum and
the things in front of you in a lower spectrum.

Live long and prosper.
 
If you are in a plane traveling faster than the speed of sound, you can still hear perfectly fine. And if the noise of the plane were not too loud, you'd be able to hear things outside the plane perfectly fine as well (just with a nice big doppler shift). You just wouldn't be able to hear anything behind you.
 
If you are in a plane traveling faster than sound, there are two things to consider.

1) The air inside the plane is moving along at the same speed as you, so sound travels normally in there in relation to you.

2) The plane is basically outpacing the propagation of sound through the air outside the plane.
 
Since it is impossible to travel faster than the speed of light, there is no meaning to try to hypothesize what is going to happen when you travel faster than light, so, no, there is not even a theoretical phenomena.
 
I would like to use a pentaprism with some amount of magnification. The pentaprism will be used to reflect a real image at 90 degrees angle but I also want the reflected image to appear larger. The distance between the prism and the real image is about 70cm. The pentaprism has two reflecting sides (surfaces) with mirrored coating and two refracting sides. I understand that one of the four sides needs to be curved (spherical curvature) to achieve the magnification effect. But which of the...
Back
Top