What is absorptivity of a body equal to?
This ratio is defined as the emissivity ϵ of the body. Thus, Kirchhoff's law states that the emissivity of a body is equal to its absorptivity when the body remains in thermal equilibrium with its surrounding.Oct 8, 2020
This ratio is defined as the emissivity ϵ of the body. Thus, Kirchhoff's law states that the emissivity of a body is equal to its absorptivity when the body remains in thermal equilibrium with its surrounding.Oct 8, 2020