At a distance of one astronomical unit (AU) from the sun, the distance at which the earth's orbit is located, the radiative heat flux from the sun is approximately 1350

W/m². Consider a thin copperplate at this distance, one side of which faces deep space. The side facing the sun is highly polished with a solar absorptivity of 0.16 and an emissivity of 0.03, whereas the side facing deep space is oxidized with an emissivity of 0.8. Find the temperature of the plate.

Fig: 1