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Emissive power of a perfectly black body...

Emissive power of a perfectly black body at `227^@ C` is `E_b`. Emissive power of an ordinary surface of e = 0.4 at `2227^@ C` is

A

625 `E_b`

B

10 `E_b`

C

30 `E_b`

D

250 `E_b`

Text Solution

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The correct Answer is:
D
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