Question

What is the maximum radiation pressure exerted by sunlight in space ( s = 1350 w/m 2) on a flat black surface? a. 2. 25 × 10−5 pa b. 4. 5 × 10−6 pa c. 9. 0 × 10−6 pa d. 0. 06 pa e. 7 × 10−4 pa

Answer 1

The maximum radiation pressure exerted by sunlight in space on a flat black surface is  4.5 × $10^{-6}$  P a. So, the correct option is (b).

Radiation pressure is the name for the force electromagnetic wave particles exert on a surface. It is inversely related to the wave's speed. Given data

Solar constant  ( S )  =  1350W / m ^2

Now, the radiaton pressure is given by

P = 2 S /c

where c is the speed of the light

P = 2 × 1350 /3 × 10 ^8

P = 9 × $10^{-6}$  P a

For a black surface, P = 4.5× $10^{-6}$  P a

Therefore, maximum radiation pressure exerted by sunlight in space on a flat black surface is  4.5 × $10^{-6}$  P a

Learn more about radiation pressure here;

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