Question

Consider a photon with initial momentum pi on a collision course with a stationary electron of mass m. What is the total energy Ei of these two particles before the collision? Don't forget to include the rest mass energy of the electron.

Answer 1

The total energy of Ei of the two particles(momentum and mass of a electron ) before the collision is Ei=pic+mc^2

Explanation:

let m denotes the mass

let c denotes the speed of the light

let Ei denotes the total energy

Let pi denotes the initial momentum

By the equation,

Ei=pic+mc^2

The total energy of Ei of the two particles before the collision is Ei=pic+mc^2