Question

Therms value of the magnitude of the mag-
neticfield in an electromagnetic wave is
0.265µT.
Thespeed of light is 3 × 10⁸ m/s and per-
meabilityof free space is 4π × 10^-7 T · m/A.

I knowpart 1, but it is unclear how to get part 2 and 3

Part 1- Find the rms value is of the electric field.
Answerin units of V/m.

Answer= 79.5 V/m

Part 2- Find average energy density.
Answerin units of nJ/m3.

Part 3- Find the intensity.
Answerin units of W/m2.