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A point istropic light source of power P...

A point istropic light source of power `P = 12` watt is located on the axis of a circular mirror plate of radius R = 3cm. If distance of source from the plate is `alpha` = 39 cm and reflection coefficient of mirror plate is `alpha` = 0.70, calcualte force exerted by light rays on the plate.

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PHYSICS GALAXY - ASHISH ARORA-PHOTOELECTRIC EFFECT AND MATTER WAVES-Unsolved numerical problems
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