Questions
A plane em wave of wave intensity of 10 W/m2 strikes a small mirror of area 20 cm2, held perpendicular to the approaching wave. The radiation force on the mirror will be
detailed solution
Correct option is C
Radiation force = Momentum transferred per second by electromagnetic wave to the mirror=2IavAc=2×10×20×10-43×108=1.33×10-10NTalk to our academic expert!
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The radiation force experienced by body exposed to radiation of intensity I, assuming surface of body to be perfectly absorbing is:
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