7. 3.57 points SerCP10 21.P.O51 My Notes Ask Your Teach Assume that a certain lo

Question

7. 3.57 points SerCP10 21.P.O51 My Notes Ask Your Teach Assume that a certain location on the Earth reflects 33.0% of the incident sunlight from its clouds and surface. (a) Given that the intensity of solar radiation at the top of the atmosphere is 1362 W/m2, find the radiation pressure on the Earth, in pascals, at the location where the Sun is straight overhead. Pa (b) State how this quantity compares with normal atmospheric pressure at the Earth's surface, which is 101 kPa Prad timesSelecthan radiation pressure Need Help?Read t

Explanation / Answer

(a)

So we have to deal with two parts to the radiation pressure.

Radiation pressure due to reflection:

Pr = 2*l /c

due to absorption:

Pa = l / c

Ptot = Pr + Pa

Ptot = 2*0.33*1362/2.997*108 + 0.67*1362 / 2.997*108

Ptot = 1.49*10-6 + 3.04*10-6

Ptot = 4.53*10-6 Pa

(b)

Patm/Prad = 101*103 / 4.53*10-6 = 2.22*1010 than radiation pressure.

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