The rate of radiant energy, which is emitted by a surface at any temperature and in small wavelength is found from the known rate of energy, which under the same condition would be emitted from a black surface by multiplying with the absorptivity. Above enunciation is known as

The rate of radiant energy, which is emitted by a surface at any tempe

1.	The rate of radiant energy, which is emitted by a surface at any temperature and in small wavelength is found from the known rate of energy, which under the same condition would be emitted from a black surface by multiplying with the absorptivity. Above enunciation is known as
A.	Planck's law
B.	Kirchhoff's law
C.	Stefan Boltzman law
D.	Lambert rule
E.	None of the above
Answer» F.