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 highly conducting solid sphere of radius R, density rho and specific

1.	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
Answer» `(3(I-2sigmaT^(4)))/(2R rho s)` `(3(I-4sigmaT^(4)))/(4R rho s)` `(4(I-4sigmaT^(4)))/(4R rho s)` `(3(I+4sigmaT^(4)))/(4R rho s)` ANSWER :B