Published by:
CGP EDU Academic Team
Published on: September 12, 2026
If the sun’s surface radiates heat at $6.3 \times 10^{7} \mathrm{Wm}^{-2}$ . Calculate the temperature of the sun assuming it to be a black body $\left(\sigma = 5.7 \times 10^{-8} \mathrm{Wm}^{-2} \mathrm{K}^{-4}\right)$
Text Solution
Verified by ExpertsThe correct answer is:
A
From Stefan’s law $E = \sigma T^{4}$
$T^4 = \frac{E}{\sigma} = \frac{6.3 \times 10^7}{5.7 \times 10^8} = 1.105 \times 10^{15} = 0.1105 \times 10^{16}$
$T = 0.58 \times 10^{4} \mathrm{K} = 5.8 \times 10^{3} \mathrm{K}$
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