Question: Ok, now let's work through this problem 4, An electron-positron pair at rest annihilate, creating two photons. A. What does it mean for an electron

Ok, now let's work through this problem

4, An electron-positron pair at rest annihilate, creating two photons. A. What does it mean for an electron and positron to annihilate? B. What are the wavelengths of the two photons in the frame of the electron- positron? (NOTE: This was an example from class. Be sure to explain each step!) C. At what speed must an observer move along the line of the photons in order that the wavelength of one photon be twice that of the other? (HINT: This is a review problem from Week 3... The observer must be moving relativistically... )

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