Practice portal › Electromagnetic Waves › Momentum, Radiation Pressure and Force on a Charge
Asked in JEE Main 2004 · Momentum delivered: absorbed or reflected
The incoming radiation carries momentum pᵢ = E/c towards the surface
A perfect reflector sends it back with pᵣ = - E/c, so the change in the radiation's momentum is 2E/c
B_y momentum conservation the surface receives 2E/c (an absorber would receive only E/c)
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