Question 156: EM waves

Question

During the propagation of electromagnetic waves in a medium :

Accepted Answer

$${E_0} = C{B_0}$$ and $$C = {1 \over {\sqrt {{\mu _0}{\varepsilon _0}} }}$$
Electric energy density $$ = {1 \over 2}{\varepsilon _0}{E_0}^2 = {\mu _E}$$
Magnetic energy density $$ = {1 \over 2}{{{B_0}^2} \over {{\mu _0}}} = {\mu _B}$$
Thus, $${\mu _E} = {\mu _B}$$
Energy is equally divided between electric and magnetic field

Answer

Electric energy density is double of the magnetic energy density.

Answer

Electric energy density is half of the magnetic energy density.

Answer

Electric energy density is equal to the magnetic energy density.

Answer

Both electric and magnetic energy of densities are zero.

EM waves

During the propagation of electromagnetic waves in a medium :

Choose the correct answer: