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A spherical black body with a radius of ...

A spherical black body with a radius of `12cm` radiates `450W `power at `500K`. If the radius were halved and the temperature doubled, the power radiated in watt would be

A

`225`

B

`450`

C

`900`

D

`1800`

Text Solution

Verified by Experts

The correct Answer is:
D
`P = sigmaAT^(4) rArr P =sigma (4piR^(2))T^(4)`
`(P_(1))/(P_(2))=((R_(1))/(R_(2)))^(2)xx((T_(1))/(T_(2)))^(4)` .
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