Doubt: A point source of light is placed at the centre of a hemispherical surface.The radius of curvature is r and the inner surface is completely reflecting .Find the force on hemisphere due to light falling into if the source emits a power W. Chapter: Dual Nature of Radiation and Matter - Subject: Physics - Course: NEET Physics Course

Doubt by Samriti

A point source of light is placed at the centre of a hemispherical surface.The radius of curvature is r and the inner surface is completely reflecting .Find the force on hemisphere due to light falling into if the source emits a power W.

Video: #4 | Solved Problems: Set 1

Video Time: 0 Min 1 Sec

Answers

Answer by Shreya

For complete reflection, change in momentum is 2U/c
Thus,

$F o r c e = \frac{d}{d t} (\frac{2 U}{c}) = \frac{2 P}{c}$

Doubt by Samriti

Answers

Answer by Shreya

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