The plots of intensity of radiation versus wavelength of three black bodies at temperatures T1, T2 and T3 are shown. Then,

Question

The plots of intensity of radiation versus wavelength of three black bodies at temperatures T1, T2 and T3 are shown. Then, (A) T3>T2>T1 (B) T1>T2>T3 (C) T2>T3>T1 (D) T1>T3>T2

Tardigrade Admin · Accepted Answer

According to Wien's law if λ is the wavelength at maximum intensity λ T= constant. ∴ Shorter the wavelength of the peak, greater the temperature for intensity vs λ graph. (λ max ., is not maximum wavelength but λ at maximum intensity) T1 >T3 >T2

Q. The plots of intensity of radiation versus wavelength of three black bodies at temperatures $T_{1}, T_{2}$ and $T_{3}$ are shown. Then,

$T_{3} > T_{2} > T_{1}$

$T_{1} > T_{2} > T_{3}$

$T_{2} > T_{3} > T_{1}$

$T_{1} > T_{3} > T_{2}$

According to Wien's law if $λ$ is the wavelength at maximum intensity
$λ T =$ constant.
$∴$ Shorter the wavelength of the peak, greater the temperature for intensity vs $λ$ graph.
$(λ_{m a x}$ , is not maximum wavelength but $λ$ at maximum intensity)
$T_{1} > T_{3} > T_{2}$

Q. The plots of intensity of radiation versus wavelength of three black bodies at temperatures T1​,T2​ and T3​ are shown. Then,

T3​>T2​>T1​

T1​>T2​>T3​

T2​>T3​>T1​

T1​>T3​>T2​