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Assuming the sun to have a spherical out...

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` from the centre of the sun is
where `sigma` is the Stefan's constant.

A

`(4 pir^(2)t^(4))/(R^(2))`

B

`(r^(2) sigma (t + 273)^(4))/(4 pi R^(2))`

C

`(16 pi^(2) r^(2) sigma t^(4))/(R^(2))`

D

`(r^(2) sigma (t + 273)^(4))/(R^(2))`

Text Solution

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The correct Answer is:
d
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