A plane electromagnetic wave, has frequency of 2.0 10^ 10 Hz and its energy density is 1.02 10^ -8 J/ m ^3 in...

Question

A plane electromagnetic wave, has frequency of 2.0 10^ 10 Hz and its energy density is 1.02 10^ -8 J/ m ^3 in vacuum. The amplitude of the magnetic field of the wave is close to ( 1 4 _0 =9 10^9 Nm ^2 C ^2 and speed of light = 3 10^8 ms ^ -1 ):

Accepted Answer

(B)

JEE Main 2020 Physics question

Solution