A sphere of `3 cm` radius acts like a black body. If it is in equilibrium with its surrounding and absorb `30 K` watt of energy radiated to it from the surrounding. Then the temperature of the sphere will be:

A sphere of 8cm radius behaves like a black body. It is in thermal equilibrium with the surrounding and absorbs 10 W of power radiated to it from surrounding. The temperature of the sphere ( sigma=5.67xx10^(-8)W//m^(2)K^(4) ) is approximately.

A sphere of 8cm radius behaves like a black body. It is in thermal equilibrium with the surrounding and absorbs 10 W of power radiated to it from surrounding. The temperature of the sphere ( sigma=5.67xx10^(-8)W//m^(2)K^(4) ) is approximately.

A body is in thermal equilibrium with the surrounding, then the ratio of Amount of radiations emitted and absorbed by it will be equal to ?

A perfectly black sphere of diameter 0.2 m is in thermal equilibrium with the surrounding. What is the temperature of the surrounding, if its rate of absorption of heat energy from the surrounding is 5.67xx4pixx10^(2) watt? [ sigma=5.67xx10^(-8) S.I. units]