Suppose the average intensity of the solar radiation that strikes normally on a surface just outside...

Suppose the average intensity of the solar radiation that strikes normally on a surface just outside Earth's atmosphere is 1.4 kW/m². (It is actually 1.4 kW/m².) (a) What would be the radiation pressure p_r exerted on this surface, assuming complete absorption? (b) For comparison, find the ratio of p_r to Earth's sea-level atmospheric pressure, which is 1.0 x 10⁵ Pa.

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Expert Solution

intensity of solar radiation is I = 1.4 kW/m²

Radiation pressure is P = I / c

= 1.4 kW/m² / 3 x 10⁸ m/s

= 4.667 x 10^-6 N/m²

(b)

The ratio between earth's sea-level atmospheric pressure is

P / Po = 4.667 x 10^-6 N/m² / 1 x 10⁵ N/m²

= 4.667 x 10^-11 N/m²

genius_generous answered 1 year ago

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