Yes! Light applies force

Classical Mechanics Level 3

Consider a sphere of radius R R and reflectivity r r placed in the path of a parallel beam of light of large aperture. The intensity of light is I I . If the sphere does not allow any light to be transmitted through it, then find the force of light on the sphere.

Details

c c is the speed of light.

π R 2 I r c \frac{\pi R^2Ir}{c} π R 2 I c \frac{\pi R^2I}{c} π R 2 I ( 1 + r ) c \frac{\pi R^2I(1+r)}{c} None π R 2 I ( 1 − r ) c \frac{\pi R^2I(1-r)}{c} π R 2 I ( 1 − r ) 2 c \frac{\pi R^2I(1-r)}{2c}

Akshat Sharda by Akshat Sharda , 21, India

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