Doppler Effect: Solving 4-Vectors Problem

[karoliina]

Homework Statement

Here is my problem:
DOPPLER EFFECT:
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!
Karoliina.

 

[tiny-tim]

Welcome to PF!

Hi Karoliina ! Welcome to PF!

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!