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29-04-2024
Physics

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Light with an average flux of 20 W/cm² falls on a non-reflecting surface at normal incidence having area 20cm². The energy recieved by the surface during timespan of 1 minute is :

A. 24×10³ J
B. 48×10³ J
C. 10×10³ J
D. 12×10³ J

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