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Homework Help: 4-vectors problem

  1. Mar 26, 2009 #1
    1. The problem statement, all variables and given/known data
    Here is my problem:
    Consider a photon traveling in the x direction. Ignoring the y and z components, and setting c=1, the 4-momentum is (p,p). In matrix notation, what are the Lorentz transformations for the frames traveling to the left and to the right at speed v? What is the new 4-momentum of the photon in these new frames?
    That's all that I have... :(
    Thank you in advance for any suggestion!
  2. jcsd
  3. Mar 27, 2009 #2


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    Welcome to PF!

    Hi Karoliina ! Welcome to PF! :wink:

    I think it's asking, if the photon is going in the x-direction, so its 4-momentum is (p,p,0,0), what is the Lorentz transformation matrix for speed v in the y-direction, and what does that convert (p,p,0,0) to?

    Show us what you get! :smile:
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