If the absorption and reflection coefficients of a surface of a body are $0.4$ and $0.6$ respectively,then

Select the incorrect statement.

$A$ thermopile is used for:

The spectrum of black body radiation is a ...... .

If $e_\lambda$ and $a_\lambda$ are the emissive power and absorptive power of a body respectively,and $E_\lambda$ is the emissive power of a perfectly black body,what is the relation according to Kirchhoff's law?

One likes to sit under sunshine in the winter season,because