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The rate at which radiant energy from the sun reaches the earth s upper atmosphere is about 1.50 kW /m2• The distance from the earth to the sun is 1.50 X 1011 m, and the radius of the sun is 6.96 X 108 m.
(a) What is the rate of radiation of energy per unit area from the sun s surface?
(b) If the sun radiates as an ideal blackbody, what is the temperature of its surface? |
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