Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Theory of relativity sets limits

  1. Oct 7, 2004 #1
    einstein's theory of relativity sets limits on speed, saying it cannot be greater than c, the speed of light. What does this imply for the limits of momentum and energy?
  2. jcsd
  3. Oct 7, 2004 #2


    User Avatar
    Staff Emeritus
    Gold Member
    Dearly Missed

    Special relativity does not limit momentum and energy. Light can carry both, and the difference between two momenta in the case of light is expressed by frequency. And in SR itself (absent all considerations of quanta, Planck length, etc.) there is no upper limit on frequency. The kinetic energy of the light goes up along with the momentum, according to a well-known law of SR.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook