Questions
A plane e.m. wave of wave intensity 10 W,/m2 strikes a small minor 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 electromagnetism wave to the mirror=2SaVAc=2×10×20×10−43×108 =1.33×10−10NTalk to our academic expert!
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In a region of free space during the propagation of electromagnetic wave, the electric field at some instant of time t is and the magnetic field is The poynting vector for these fields at that point is
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