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Photoelectric Effect and WaveParticle Duality — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsPhotoelectric Effect and WaveParticle Duality1 Mark
Question
Consider the situation described in the previous problem. Show that the force on the sphere due to the light falling on it is the same even if the sphere is not perfectly absorbing.
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Answer

For a perfectly reflecting solid sphere of radius ‘r’ kept in the path of a parallel beam of light of large aperture with intensity ‘I’, force exerted $=\frac{\pi\text{r}^2\text{I}}{\text{C}}$

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