Question

In a plane radio wave the maximum value of the electric field component is 6.22 V/m. Calculate (a) the maximum value of the magnetic field component and (b) the wave intensity.

Answer 1

Given:

Maximum value of the electric field

component is = E = 2.00 V/m.

The B field can be found by the

fallowing formula :

B = E/ C

where C is the velocity of

light : 3 x 10⁸ m/s

thus, B = 6.22 / 3 x10⁸  

   = 2.07 x 10^{-8 Tesla}

Intensity:

   I = E_max²   / 2 ? _oc   

        = 6.22² / ( 2 x 4? x 10^-7 x 3 x 10⁸)

         =0.051 W/m²