Question: A small spherical satellite is in circular orbit round the Sun. The Sun subtends at the satellite a solid angle of 7 105 steradians,

A small spherical satellite is in circular orbit round the Sun. The Sun subtends at the satellite a solid angle of 7 × 10–5 steradians, and the temperature of the satellite is uniform. Assuming that the emissivity of the satellite is independent of wavelength, calculate this temperature. (The effective black-body temperature of the sun’s surface is 5800 K.)

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