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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? ( $\sigma$ stands for Stefan's constant.)
  • A$\left(\frac{4 \pi R^2 Q}{\sigma}\right)^{1 / 4}$
  • B$\left(\frac{Q}{4 \pi R^2 \sigma}\right)^{1 / 4}$
  • C$\frac{Q}{4 \pi R^2 \sigma}$
  • D$\left(\frac{Q}{4 \pi R^2 \sigma}\right)^{-1 / 2}$
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