Physics
Physics, 02.06.2021 17:00, davidoj13

If a sunspot has a temperature of 3100 K and the photosphere of the Sun has a temperature of 5770 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 3100 K and the photosphere of the Sun has a temperature of 5770 K...

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