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1: A photon of energy 90 MeV and one of 50 MeV move toward each other...

1: A photon of energy 90 MeV and one of 50 MeV move toward each other along the x-axis and collide.

Part A: What is the momentum of each photon? What is the total momentum of the system?

Part B: What is the resting mass energy of this system of two photons? (HINT: Use Invariant Mass.) Can this collision create a pion?

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