If the total energy is transferred by the electromagnetic waves on a surface be U in time t, then the total momentum delivered to the surface is
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $\frac{U}{c}$
For electromagnetic waves, the energy U and momentum (P) are related -
$U=cP$
$⇒P=\frac{U}{c}$ [c → speed of light]