Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature {\f}^{\circ} {\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.

Correct Answer is : r2σ(t+273)4/R2

r^2 \sigma(t+273)^4{/} 4 \pi R^2

AIPMT 2007 Physics and Chemistry Paper

Question : 14 of 100

Marks: +1, -0

Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature f∘C, the power received by a unit surface. (normal to the incident rays) at distance R from the centre of the Sun is:- Where σ is the Stefan's Constant.

r2σ(t+273)4/R2
4πr2σt4/R2
r2σ(t+273)4/4πR2
16π2t2σt4/R2

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