Two black metallic spheres of radius 4m,...

Two black metallic spheres of radius 4m, at 2000 K and 1m at 4000 K will have ratio of energy radiation as

A

`1 : 1`

B

`4 : 1 `

C

`1 : 4`

D

`2 : 1`

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The correct Answer is:

a

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