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A black body is at 727⁰C. It emits energy at a rate which is proportional to

A black body is at 727⁰C. It emits energy at a rate which is proportional to

Options

(a) (1000)⁴
(b) (1000)²
(c) (727)⁴
(d) (727)²

Correct Answer:

(1000)⁴

Explanation:

According to Stefan’s law, E α T⁴
E α (t + 273)⁴ K [723⁰C = (727 + 273)K]
E α (727 + 273)⁴ K
E α (1000)⁴ K

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