Optics Question 310

Question: A plane electromagnetic wave is incident on a material surface. If the wave delivers momentum p and energy E, then

Options:

A) p = 0, E = 0

B) p ¹ 0, E ¹ 0

C) p ¹ 0, E = 0

D) p = 0, E ¹ 0

Show Answer

Answer:

Correct Answer: B

Solution:

EM waves carry momentum and hence can exert pressure on surfaces. They also transfer energy to the surface so $ p\ne 0 $ and $ E\ne 0 $ .



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