state and prove kirchoffs law of heat radiation
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Kirchoff's law states that the ratio of the emissive power to absorptive power for the radiation of a given wavelength is constant for all substances, at the same temperature. ... Amount of radiation absorbed by body per second per unit area = aλ Q. The body is in thermal equilibrium with the enclosure.
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Kirchoff's law states that the ratio of the emissive power to absorptive power for the radiation of a given wavelength is constant for all substances, at the same temperature. ... Amount of radiation absorbed by body per second per unit area = aλ Q. The body is in thermal equilibrium with the enclosure
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