The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law. Options: A . &nbspKirchoffs B . &nbspPlanck's C . &nbspWien's displacement D . &nbspStefan-Boltzman

The ratio of the total emissive power to the absorptivity for all bodies is same

Question

The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law.

Options:

A . Kirchoffs

B . Planck's

C . Wien's displacement

D . Stefan-Boltzman

Answer: Option A

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