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?
${Q \over {4\pi {R^2}\sigma }}$
${\left( {{Q \over {4\pi {R^2}\sigma }}} \right)^{ - 1/2}}$
${\left( {{{4\pi {R^2}Q} \over \sigma }} \right)^{1/4}}$
${\left( {{Q \over {4\pi {R^2}\sigma }}} \right)^{1/4}}$
