1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I need help in physics

  1. Oct 19, 2004 #1
    what evidence can support the idea that light can travel through a vacuum?
  2. jcsd
  3. Oct 19, 2004 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    I'll just give you a hint: Do you think you have ever seen light that has already traveled through a vacuum before it reached you? Do you know of any place where there's a vacuum all the time?
  4. Oct 21, 2004 #3
    And if you need more hardcore evidence (ie mathematical) look towards the man they called Maxwell. His equations show that there does not need to be a medium for electromagnetic waves to travel through.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook