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A highly conducting solid sphere of radi...

A highly conducting solid sphere of radius R, density `rho` and specific heat s is kept in an evacuated chamber. A parallel beam of electromagnetic radiation having uniform intensity I is incident on its surface. Assume that the surface of the sphere is perfectly black. Calculate the rate of increase of temperature

A

`(3(I-2sigmaT^(4)))/(2R rho s)`

B

`(3(I-4sigmaT^(4)))/(4R rho s)`

C

`(4(I-4sigmaT^(4)))/(4R rho s)`

D

`(3(I+4sigmaT^(4)))/(4R rho s)`

Text Solution

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The correct Answer is:
B
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