Radiations of intensity 0.5 W / m 2 are striking a metal plate. The pressure on the plate is Options: A . &nbsp0.166× 10−8 N/m2 B . &nbsp0.332× 10−8 N/m2 C . &nbsp0.111× 10−8 N/m2 D . &nbsp0.083× 10−8 N/m2

Radiations of intensity 0.5W/m2 are striking a metal plate. The pressure on

Question

Radiations of intensity

0.5 W / m^{2}

are striking a metal plate. The pressure on the plate is

Options:

A . 0.166× 10−8 N/m2

B . 0.332× 10−8 N/m2

C . 0.111× 10−8 N/m2

D . 0.083× 10−8 N/m2

Answer: Option A
:
A
Intensity or power per unit area of the radiations

P = f v

\Rightarrow f = \frac{P}{v} = \frac{0.5}{3 \times 10^{8}} = 0.166 \times 10^{- 8} N / m^{2}

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