Two bodies of same shape, same size and same radiating power have emissivity 0.2 and 0.8..

Q: Two bodies of same shape, same size and same radiating power have emissivity 0.2 and 0.8. The ratio of their temperature is

(a) √3 ∶ 1

(b) √2 ∶ 1

(c) 1 ∶ √5

(d) 1 ∶ √5

Ans: (b)