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There are two thin spheres A and B of th...

There are two thin spheres A and B of the same material and same thickness. They behave like black bodies, Radius of A is double that of B and Both have same temperature T. When A and B are kept in a room of temperature `T_0 (lt T)`, the ratio of their rates of cooling is (assume negligible heat exchange between A and B).

A

`2 : 1`

B

`1 : 1`

C

`4 : 1`

D

`8 : 1`

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The correct Answer is:
B
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