Light with an energy flux of 20 W/cm2 falls on a non-reflecting surfac – InterviewSolution

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1.	Light with an energy flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence. If the surface has anarea of 30 cm2. The total momentum delivered (forcomplete absorption) during 30 minutes is
Answer» energy flux =20w/cm^2energy =20*30=600momentum =600/30=20

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