Question

electric field correlation in terms of intensity correlation

Answer 1

A question in my textbook involve finding the electric field amplitude at a point in space given the intensity of light. It uses the following equation to solve it: -
12I=12ϵ0|Erms|2c12I=12ϵ0|Erms|2c
But where did this equation come from? I am unable to find an explanation for this anywhere.

Answer 2

HELLO FRIEND HERE IS UR ANSWER ♥️

12I=12ϵ0|Erms|2c12I=12ϵ0|Erms|2c