A 100 W light bulb is placed at the center of a spherical chamber of radius 20 cm. Assume that 60% of the energy supplied to the bulb is converted into light and that the surface of the chamber is perfectly absorbing. Find the pressure exerted by the light on the surface of the chamber

If the is fully absorbing, then force exerted is


=


60% of original power is used, 60W.


Then the force is =


Then the pressure is force /area.


And it is pressure



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