Thermal Properties of Matter - Result Question 42
43. A black body is at temperature of $500 K$. It emits energy at rate which is proportional to [1997]
(a) $(500)^{4}$
(b) $(500)^{3}$
(c) $(500)^{2}$
(d) 500
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Answer:
Correct Answer: 43. (a)
Solution:
- (a) According to Stefan’s Law $E=\sigma e A T^{4}$
$E \propto T^{4} ;$ so, $E \propto(500)^{4}$
