A plane electromagnetic wave is incident on a material surface. If wave delivers momentum p and ener

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8.Electromagnetic waves

easy

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

A

$p = 0, E = 0$

B

$p \neq 0, E \neq 0$

C

$p \neq 0, E = 0$

D

$p = 0, E \neq 0$

Solution

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

Standard 12

Physics

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