The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is

Options

A. `c:1`
B. `c^2:1`
C. `1:1`
D. `sqrtc:1`

Answer

C

Explanation

As intensity due to electric field `I_E=1/2 cepsilon_0E^2` ,
Intensity due to magnetic field `I_B=(cB^2)/(2mu_0)`
`I_E/I_B=(1/2cepsilon_0E^2)/(cB^2//2mu_0)=(epsilon_0mu_0)(E//B)^2=(1/c^2)(c^2)=1` (as `c=1/sqrt(epsilon_0mu_0` and E/B=c )