The Sun has a diameter of approximately 1.4 x 109 m and a surface temperature of about 5650 C.  Assuming that the Sun radiates as a blackbody with emissivity of unity, calculate the power radiated by the Sun into the solar system, which you can assume is at the temperature of the microwave background radiation.

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter28: Quantum Physics
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The Sun has a diameter of approximately 1.4 x 109 m and a surface temperature of about 5650 C. 
Assuming that the Sun radiates as a blackbody with emissivity of unity, calculate the power radiated by the Sun into the solar system, which you can assume is at the temperature of the microwave background radiation.

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