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!