Assuming the sun to have a sphericakl outer surface of radius r radiating like a black body at temperature t^(0)C, the power received by a unit surface, (normal to the incident rays) at distance R from the centre of the sun is (where sigma is the Stefan.s constant)

Assuming the sun to have a sphericakl outer surface of radius r radiat

1.	Assuming the sun to have a sphericakl outer surface of radius r radiating like a black body at temperature t^(0)C, the power received by a unit surface, (normal to the incident rays) at distance R from the centre of the sun is (where sigma is the Stefan.s constant)
Answer» `(4PI R^(2)SIGMA t^(4))/(R^(2))` `(r^(2)sigma(t+273)^(4))/(4pi R^(2))` `(16pi^(2)r^(2)sigma t^(4))/(R^(2))` `(r^(2)sigma(t+273)^(4))/(R^(2))` Answer :D