Assuming the sun to have a spherical outer surface of radius r , radiating like a black body at temperature t ∘ C , the power received by a unit surface, (normal to the incident rays) at a distance R

Question

Assuming the sun to have a spherical outer surface of radius $r$ , radiating like a black body at temperature $t^{\circ} C$ , the power received by a unit surface, (normal to the incident rays) at a distance $R$ from the centre of the sun is: where $σ$ is the Stefan's constantNEET 2007

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Answer:

C

Solution:

$Solar constant = \frac{σ ( 4 π r ^{2} ) T ^{4}}{( 4 π R ^{2} )} = \frac{σ r ^{2} ( t + 273 ) ^{4}}{R ^{2}}$

TestHub · Accepted Answer

Solar constant ​ = ( 4 π R 2 ) σ ( 4 π r 2 ) T 4 ​ = R 2 σ r 2 ( t + 273 ) 4 ​ ​

Physics - Heat & Thermo Question with Solution | TestHub

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