If the radius of a star is r and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q ?
(σ stands for Stefan’s constant.)
Answer & explanation
Correct answer: option 2
\(\frac{Q}{A} = \sigma T^4 \)
⇒ \( T = [\frac{Q}{4 \sigma \pi R^2}]^{1/4}\)