Radiation of intensity `1 W//m^(2)` are striking on a metal plate. The pressure on the plate is
Radiation of intensity `1 W//m^(2)` are striking on a metal plate. The pressure on the plate is
A. `0.66 xx 10^(-8) N//m^(2)`
B. `0.25 N//m^(2)`
C. `2 N//m^(2)`
D. `4 N//m^(2)`
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Correct Answer - A
As metal is reflecting surface and for reflecting surface radiation pressure, `p_(r) = (2S)/(c) = (2 xx 1)/(3 xx 10^(8)) = 0.667 xx 10^(-8) Nm^(-2)`
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