Question

Wien's displacement law for emission of radiation can be written as

• A. $\lambda _{\max }$ is proportional to absolute temperature $(T)$
• B. $\lambda_{\max }$ is proportional to square of absolute temperature $(T^{2})$
• C. $\lambda _{\max }$ is inversely proportional to absolute temperature $(T)$
• D. $\lambda_{\max}$ is inversely proportional to square of absolute temperature $(T^{2})$ ( $\lambda _{\max }$ = wavelength whose energy density is greatest)

Answer 1

Answer: (C)

Wien's displacement law $\lambda_{\max } \cdot T=b$
where $b=$ Wien's constant
$\therefore \lambda_{\max } \propto \frac{1}{T}$ Thus, $\lambda_{\max }$
is inversely proportional to absolute temperature $(T)$.