A plane electromagnetic wave of frequency `25` MHz travels in free space along the x-direction. At a particular point in space and time, `vec(E)=6.3hat(j)V//m`. What is B at this point ?

A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength?

In an electromagnetic wave, the oscillating electric field having a frequency of 3 * 10^12 Hz and an am plitude of 30 V/m propagates in free space in the positive x-direction Write down the expression to represent the electric field