Question 112: EM waves

Question

For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric (Ue) and magnetic (Um) fields is :

Accepted Answer

In EMW, average energy density due to electric field (U
e
) and magnetic field (U
m
) is same.

Answer

Ue = Um

Answer

Ue $$
e$$ Um

Answer

Ue < Um

Answer

Ue > Um

EM waves

For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric (Ue) and magnetic (Um) fields is :

Choose the correct answer: