Q: A plane electromagnetic waves is incident on a material surface . The wave delivers momentum p and energy E
(a) p ≠ 0 , E ≠ 0
(b) p = 0 , E = 0
(c) p = 0 , E ≠ 0
(d) p ≠ 0 , E = 0
Ans: (a)
Sol: When plane electromagnetic waves is incident on a material surface . The wave delivers some momentum and energy to the surface hence p ≠ 0 , E ≠ 0 .