We have learnt the below formula for a plane sheet of charge with thickness. E=σ/ϵ and the one below for with no thickness (negligible) E=σ/2ϵ The problem, I am facing is digesting the derived equations. It is one thing for sure that these formulas must be right. But then the fact that E is proportional to the square of the distance between the test charge (Or any other charge, taken from columbs law.) is disobeyed by it (Atleast that's what I think.) I have seen alternate derivations with the same expression. Why is this not obeyed, or is it obeyed over here. Thank you.