The absorptivity of a body is equal to its emissivity

Name: The absorptivity of a body is equal to its emissivity
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The absorptivity of a body is equal to its emissivity under thermal equilibrium according to Kirchhoff's law of thermal radiation. This law states that for an object in thermal equilibrium, the emissivity (the ability to emit thermal radiation) equals the absorptivity (the ability to absorb thermal radiation).

The Absorptivity of a Body Is Equal to Its Emissivity