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baltimorebest

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## Homework Statement

An electron with energy 10^3 MeV collides with a photon whose wavelength corresponds to the maximum wavelength of the 2.7-K cosmic background radiation. What is the maximum energy loss the electron can suffer as a result of the collision? What is the wavelength of the photon after this maximal collision?

## Homework Equations

## The Attempt at a Solution

I need help starting this problem, if anyone can help me. Thanks.