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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Thermal Properties of Matter

Olympiad workbook · NSEP · Thermal Properties of Matter

Assuming the Sun to be a spherical body (radius R_ S ) of surface...

Assuming the Sun to be a spherical body (radius

\mathrm{R}_{\mathrm{S}}

) of surface temperature T , the total radiation power received by Earth (radius

\mathrm{R}_{\mathrm{E}}

) at a distance r from

\operatorname{Sun}

is

Options

A $\frac{\sigma \pi \mathrm{R}_E^2 \mathrm{R}_s^2 T^4}{r^2}$
B $\frac{\sigma 4 \pi \mathrm{R}_E^2 \mathrm{R}_S^2 T^4}{r^2}$
C $\frac{\sigma \pi \mathrm{R}_E^2 \mathrm{R}_s^2 T^4}{4 r^2}$
D $\frac{\sigma \mathrm{R}_E^2 \mathrm{R}_S^2 T^4}{4 \pi r^2}$

Correct answer

A. $\frac{\sigma \pi \mathrm{R}_E^2 \mathrm{R}_s^2 T^4}{r^2}$

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