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If a sunspot has a temperature of 3900 K and the photosphere of the Sun has a temperature of 5760 K, how many times brighter per unit area is the photosphere than the sunspot?
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If a sunspot has a temperature of 3900 K and the photosphere of the Sun has a temperature of 5760 K, how many times

brighter per unit area is the photosphere than the sunspot?

User Hirumina
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Answer:

Explanation:

User Andrew Barnett
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