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magma_saber

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## Homework Statement

Suppose that a positron traveling at a speed of 0.93c collides head on with an electron traveling at the same speed.

What is the sum of the energies of the two photons?

## Homework Equations

mass of an electron = 9e-31 kg

E=[tex]\gamma[/tex]mc

^{2}- mc

^{2}

## The Attempt at a Solution

2.2032e-13 - 8.1e-14 = 1.3932e-13

1.393e-13 * 2 = 2.7864e-13 J