Concept explainers
(a)
The power radiating from the sun at uniform temperature.
(a)
Answer to Problem 75AP
The power radiating from the sun at uniform temperature is
Explanation of Solution
Given info: The area of photosphere is
The expression for the power
Here,
Substitute
Conclusion:
Therefore, the power radiating from the sun at uniform temperature is
(b)
The power output of the patch from the sun at non uniform temperature.
(b)
Answer to Problem 75AP
The power output of the patch from the sun at non uniform temperature is
Explanation of Solution
Given info: The
The expression for the power radiated from the surface of the photosphere is,
Here,
Substitute
Conclusion:
Therefore, The power output of the patch from the sun at non uniform temperature is
(c)
The comparison of the answers of part (a) and (b).
(c)
Answer to Problem 75AP
The answer of part (b) is
Explanation of Solution
The expression for comparing the answers is,
Here,
Substitute
Conclusion:
Therefore, the answer of part (b) is
(d)
The average temperature of the patch.
(d)
Answer to Problem 75AP
The average temperature of the patch is
Explanation of Solution
Let the average temperature is
The Stefan’s law is,
Here,
Substitute
Conclusion:
Therefore, the average temperature of the patch is
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Chapter 20 Solutions
Physics For Scientists And Engineers With Modern Physics, 9th Edition, The Ohio State University
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