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Absolute zero (ā273.15Ā°C) is the coldest possible temperature ā at which atoms nearly stop moving.
Did you know?
Absolute zero (ā273.15Ā°C) is the coldest possible temperature ā at which atoms nearly stop moving.
Light with an energy flux of Wm falls on a perfectly reflecting surface at normal incidence. If the surface area is cm the average force exerted on the surface is
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To solve this problem, we need to calculate the force exerted by light on a perfectly reflecting surface.The force exerted by light on a surface is given by the change in momentum per unit time. For a perfectly reflecting surface,the change in momentum is twice the momentum of the incident light.The momentum of light is related to its energy flux by the equation:
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