0

When light travels through a medium, even a sparse medium, it slows down from the speed of light in vacuum to the speed of light in that medium. When that light re-enters a true vacuum, it will resume moving at the speed of light in a vacuum.

  1. Why the light doesn't keep the same speed it had when it was in the prism, when it excite the prism ?
  2. Is the acceleration instantaneous at the exit of the prism ?
  3. What makes the light keep going and not slowing down and stopping ?

enter image description here

Qmechanic
  • 201,751
Hey StackExchange
  • 205
  • 2
    You should actually study what happens when light enters a medium. There is a good explanation here. – joseph h Aug 06 '22 at 10:15
  • 1
    Possible duplicates: https://physics.stackexchange.com/q/11820/2451 , https://physics.stackexchange.com/q/466/2451 , https://physics.stackexchange.com/q/20289/2451 and links therein. – Qmechanic Aug 06 '22 at 10:58

0 Answers0