Question

6.117. If the temperature of a solid surface chan-
ges form 27°C to 627°C, then its emissive
power changes in the ratio of
(a) 3
(b) 6
(c) 9
(d) 27
les 81.​

Answer 1

Explanation:

emissive power is proportional to T^4

so E1/E2 = (900/300)^4 => 81

Answer 2

emissive power is proportional to T^4

so E1/E2 = (900/300)^4 => 81