The average energy flux of sunlight is 1.0 kWm−2 . This energy of radiation is falling normally on the metal plate surface of area 10cm2 which completely absorbs the energy. The force exerted on the plate if it is exposed to sunlight for 10 minutes is

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3.3×10−2N

3.3×10−9N

3.3×10−6N

3.3×10−3N

answer is B.

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Detailed Solution

Force on the plate, F=PA = IcA [here P = Radiation Pressure] ⇒F =10003×108×10×10-4=3.3×10−9N

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