Assume that a certain location on the Earth reflects $29\mathrm{.}0\%$ of the incident sunlight from its clouds and surface.

$($a$)$ Given that the intensity of solar radiation at the top of the atmosphere is $1369$ W$/$m$2,$ find the radiation pressure on the Earth, in pascals, at the location where the Sun is straight overhead.

Your response is within $10\%$ of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four$-$digit accuracy to minimize roundoff error. Pa

$($b$)$ State how this quantity compares with normal atmospheric pressure at the Earth's surface, which is $101$ kPa.

PatmPrad

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