Question

Relation between intensity of light and amplitude of electric field?

Answer 1

intensity means power of flowing

amplitude means at what speed the light is flowing

Answer 2

Hello mate here is your answer.

Electromagnetic waves can bring energy into a system by virtue of their electric and magnetic fields. These fields can exert forces and move charges in the system and, thus, do work on them. If the frequency of the electromagnetic wave is the same as the natural frequencies of the system (such as microwaves at the resonant frequency of water molecules), the transfer of energy is much more efficient.

Hope it helps you.