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Question: Answered & Verified by Expert
If $\lambda_m$ denotes the wavelength at which the radioactive emission from a black body at a temperature $T K$ is maximum, then:
PhysicsThermal Properties of MatterNEETNEET 2004
Options:
  • A $\lambda_m \propto T^4$
  • B $\lambda_m$ is independent of $T$
  • C $\lambda_m \propto T$
  • D $\lambda_m \propto T^{-1}$
Solution:
1408 Upvotes Verified Answer
The correct answer is: $\lambda_m \propto T^{-1}$
According to Wein's displacement law
$$
\begin{aligned}
\lambda_m T & =\text { constant } \\
\Rightarrow \quad \lambda_n & \propto T^{-1}
\end{aligned}
$$

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