Imagine a completely black spherical body in deep space far away from other objects and in vacuum. An energy source is present inside the body and supplies heat uniformly at an energy rate. What is the effect of this heat on the black body?
1) The black body will emit radiation at a constant temperature
2) The black body will absorb all the heat and increase in temperature
3) The black body will reflect the heat and remain at the same temperature
4) The black body will lose heat and decrease in temperature