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)