There is a black spot on a body. If the body is heated and carried into a dark room,then it glows more than the rest of the body. This can be explained on the basis of:

If the absorptance and reflectance of a surface are $0.4$ and $0.6$ respectively,then:

Which of the following laws states that "good absorbers of heat are good emitters"?

For a perfect black body,the absorption coefficient is

The Sun emits radiation in all directions. The Earth receives approximately $1.4 \ kW/m^2$ of radiation per second. The distance between the Sun and the Earth is $1.5 \times 10^{11} \ m$. How much mass does the Sun lose per day? $(1 \ \text{day} = 86400 \ s)$

We consider the radiation emitted by the human body,which of the following statements is true?