Index Key:  PHY083 
Author:     David Ratner
Subject:    Light and relativity questions
Text:       This question has to do with the speed of light.  If you are 
traveling at the speed of light and then turn on a light will you see that 
light?

Response #:  1 of 1
Author:      A. Smith
Text:        Einstein's special relativity asserts that the laws of physics do 
not change no matter how fast you are going relative to somebody else - you 
will see the same things in objects you manipulate at your speed as the other 
person sees at their speed.  So, turning on a light in a speeding spaceship 
looks just like turning on a light in your living room.  Actually, no object 
with non zero rest mass can travel at exactly the speed of light - only the 
special massless particles can do it, such as the photon, the particle of 
light itself.  So your experiment is not actually possible.