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NEET 2004
Exam
NEET
Year
2004
Subject
Physics
Chapter
Thermal Properties of Matter

NEET 2004 · Physics · Thermal Properties of Matter

If λ_m denotes the wavelength at which the radioactive emission...

If λm\lambda_m denotes the wavelength at which the radioactive emission from a black body at a temperature TKT K is maximum, then:

Options

  1. Aλm∝T4\lambda_m \propto T^4
  2. Bλm\lambda_m is independent of TT
  3. Cλm∝T\lambda_m \propto T
  4. Dλm∝T−1\lambda_m \propto T^{-1}

Correct answer

D. λm∝T−1\lambda_m \propto T^{-1}

Step-by-step solution

According to Wein's displacement lawλmT= constant ⇒λn∝T−1\begin{aligned} \lambda_m T & =\text{ constant }\\ \Rightarrow \quad \lambda_n & \propto T^{-1} \end{aligned}
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