Published by:
CGP EDU Academic Team
Published on: September 12, 2026
According to Kirchoff's law-
A
B
C
D
const.
Text Solution
Verified by ExpertsThe correct answer is:
A
Kirchhoff's law deals with the relationship between the emissivity and absorbance of a body. Specifically, it states that for a body in thermal equilibrium, the emissivity ($e$) and absorbance ($a$) of radiation are equal at a given wavelength. Therefore, the correct relation is
$a_{ ext{λ}} = e_{ ext{λ}}$ (Option A).
The other options describe various states and relations that do not adhere to Kirchhoff's law.
$a_{ ext{λ}} = e_{ ext{λ}}$ (Option A).
The other options describe various states and relations that do not adhere to Kirchhoff's law.
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