What is the minimum energy required to produce an electron-positron pair?

[arpon]

Homework Statement

The antiparticle of electron is positron, whose mass is the same as electrons, i.e. 9.1 * 10^{-31} kg but the charge is opposite. What is the minimum energy required to produce a electron-positron pair?

2. Homework Equations
E = mc^2

The Attempt at a Solution

Actually I thought, it would be just E = mc^2. But the answer doesn't match.

 

[ShayanJ]

You should calculate the energy required to produce a pair of particles i.e. two particles with equal masses!

 

[arpon]

2*mc^2 ?

 

[ShayanJ]

Yeah!