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

Length Contraction and the Conservation of Energy

  1. Apr 8, 2010 #1

    jaketodd

    User Avatar
    Gold Member

    Length contraction is one of the main aspects of relativity. However, I have a question: When something undergoes length contraction, does it become more dense or, is the decrease in length radiated in some way?

    Thank you,

    Jake
     
  2. jcsd
  3. Apr 9, 2010 #2

    bcrowell

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    It sounds like you're imagining length contraction as a physical change in the object. Length contraction is just a difference between measurements of the same thing made by different observers. But yes, according to an observer who sees an object as length contracted, its density would be increased.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook