Question

A plane electromagnetic wave with wavelength 3.0 m, travels in free space in the+xdirection with its electric field vector~E, of amplitude 300 V/m, directed along they-axis.(a) What is the frequencyfof the wave?

Answer 1

Answer:

    f =1 10⁸ Hz

Explanation:

The speed of an electromagnetic wave is given by

          c = Lam f

In our case, the wavelength is 3.0 m, so we can clear the frequency

         f = c / Lam

         f = 3 108/3.

         f =1 10⁸ Hz