At a definite temperature for a given wavelength the ratio of emissive power of all objects and that of perfectly black body at the same temperature is called as :

Question

At a definite temperature for a given wavelength the ratio of emissive power of all objects and that of perfectly black body at the same temperature is called as : (A) relative emissivity (B) emissivity (C) absorption coefficient (D) reflection coefficient

Tardigrade Admin · Accepted Answer

According to Kirchhoff at a given temperature for a given wavelength ratio of emissive power of all objects at that of perfectly black body is emissivity.

Q. At a definite temperature for a given wavelength the ratio of emissive power of all objects and that of perfectly black body at the same temperature is called as :

relative emissivity

emissivity

absorption coefficient

reflection coefficient

According to Kirchhoff at a given temperature for a given wavelength ratio of emissive power of all objects at that of perfectly black body is emissivity.