If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously will be
(a) 32
(b) 16
(c) 4
(d) 64
Correct Answer : (d) 64
Explanation:
E = σAT4
A α R2
.·. Eα R2T4
