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The rectangular surface of area 8 cm xx ...

The rectangular surface of area `8 cm xx 4 cm` of a black body at temperature `127^(@)C` emits energy `E` per section if length and breadth are reduced to half of the initial value and the temperature is raised to `327^(@)C`, the ratio of emission of energy becomes

A

`(3)/(8)E`

B

`(81)/(16)E`

C

`(9)/(16)E`

D

`(81)/(64)E`

Text Solution

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The correct Answer is:
D
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ERRORLESS -TRANSMISSION OF HEAT-Radiation (Stefan s law)
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