Question

Wien 's displacement law for emission of radiation can be written as $(\lambda_{max})$ = wavelength whose energy density is greatest)

• 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 ($T^2)$

Answer 1

Answer: (C)

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