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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectMedium2 minQB

PhysicsMediumsingle choice

A light of wavelength $λ$ and intensity I is incident normally on a plane surface. If reflection coefficient of surface is r, the pressure exerted by light on

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Solution:

Assume no transmission, so nonreflected light is absorbed Absorption contributes $\frac{( 1 - r ) I}{c}$ to pressure Reflection contributes $\frac{2 r I}{c}$

$P = \frac{I ( 1 + r )}{c}$

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: QB

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