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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 ?
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- Q/4πR2 σ
- (Q/4πR2σ)–1/2
- (4πR2Q/σ)1/4
- (Q/4πR2σ)1/4
(σ stands for Stefan’S constant)
Correct Option: D
Stefan’s law for black body radiation
| T = |  |  | 1/4 | |
| 2T |
Here e = 1
A = 4πR²
