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Riding a Spaceship

  1. Mar 9, 2009 #1
    1. The problem statement, all variables and given/known data
    You're riding a fast spaceship going 7.52 x 107m/s and you turn on your flashlight. What's the speed of the light ray relative to the spaceship? What is its speed relative to the earth?

    2. Relevant equations

    3. The attempt at a solution

    Deeply confused
  2. jcsd
  3. Mar 9, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Hint: Consider the postulates of Special Relativity. (You should be able to answer the questions immediately with no calculation.)
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