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aurao2003

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## Homework Statement

Hi

I am new to this forum and offering quantum physics at A level. Can anybody help with the following problem:

The rest energy of an electron is 0.511MeV. A positron created in a cloud chamber has 0.158MeV of kinetic energy. It collides with an electron at rest, creating two photons of equal energies as a result of annihilation.

1. calculate the total energy of the positron and the electron.

2. show that the energy of each photon is .590MeV.

Thanks

Ben