Задача 00058.

Assuming that the Sun radiates as a completely black body with a temperature T = 6 * 10 ^ 3 K, determine the energy flux density j of solar radiation at the upper boundary of the Earth’s atmosphere. Stefan-Boltzmann constant 5.7 * 10 ^ -8 W / (m ^ 2 * K ^ 4), the radius of the Sun R1 = 7 * 10 ^ 8 m, the distance from the Sun to the Earth R2 = 1.5 * 10 ^ 11 m .

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