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

Question

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 iswhere $\sigma$ is the Stefan's constant.

Accepted Answer

$\frac{r^2 \sigma(t + 273)^4}{R^2}$

Answer

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

Answer

$\frac{16\pi^2 r^2 \sigma t^4}{R^2}$

Answer

$\frac{4\pi r^2 \sigma t^4}{R^2}$

AIPMT PRELIMS 2007 Physics Radiation MCQ Question

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