NEET Questions Solved

NEET - 2014

Light with an energy flux of 25 x 104 Wm-2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15cm2 the average force exerted on the surface is





Energy flux=25x104/sm2

Force on unit area= momentum transferred in unit time on area=25x104/C


Force on the 15x10-4m2 area 



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