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Periodic Motion

Light with an...

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Light with an energy flux of 18 W/em falls on a perfectly reflecting surface at normal incidence. If the surface has an area of 20 cm. find the average force exerted on the surface during a 30 minute time span.

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Q. Light with an energy flux of

18 w / c m^{2}

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Q. Choose the correct answer from the alternatives given.
Light with an energy flux of

18 W / c m^{2}

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Q. Light with an energy flux of

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