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

Homework Help: Fractions in Einstein Relativity Theory

  1. Feb 20, 2009 #1
    1. The problem statement, all variables and given/known data
    From the formula [tex]t = \frac{L}{v+c} + \frac{L}{v-c}[/tex] I've made [tex]t = \frac{2L}{c}\left(\frac{1}{1 - \frac{v^2}{c^2}}\right)[/tex]. This is the problem:
    [tex]\left(\frac{1}{1 - \frac{v^2}{c^2}}\right) = \left(\frac{1 + \frac{v^2}{c^2}}{1 - \left(\frac{v^2}{c^2}\right)^2}\right)[/tex]

    2. Relevant equations
    That's kinda what I'm asking for. :-b

    3. The attempt at a solution
    I've gotten this far, but no more. I've tried to see how they relate, but I can't figure anything out.
  2. jcsd
  3. Feb 20, 2009 #2

    George Jones

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Factor the difference of squares in the denominator.
  4. Feb 20, 2009 #3
    You remember what [tex] x^2 - y^2 [/tex] equals to?
  5. Feb 20, 2009 #4
    I get it. Thanks so much! Kinda embarrassing. :-b
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook