1. The problem statement, all variables and given/known data Use Gauss's Law to calculate the field of an infinite plane sheet of surface charge density σ0. 2. Relevant equations 3. The attempt at a solution The solution is, where A=area: 2EA=(σ/ ϵ0)A E=σ/2ϵ0 Why is there a '2' in the solution? I know it's something to do with twice the electric field. Is it because there are two sides to the sheet surface? Thank you.