question

(a) draw a graph of a linearly polarised em wave propagating in the z-direction showing the directions of the oscillating electric and magnetic fields.

(b) write the relations (i) between the speed of light and the amplitudes of electric and magnetic fields, (ii) for the speed of em waves in terms of a permittivity , and magnetic permeability, ,  of the medium.

 

 

 

 

 

 

 

230