Shown below are the black body radiation curves at temperatures T1 and T2(T2T1) . Which of the following plots is correct?

Question

Shown below are the black body radiation curves at temperatures T1 and T2(T2>T1) . Which of the following plots is correct? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

From Wien's displacement law, we know that,

λ_{m} T =

constant
which means that as temperature increases then the
wavelength having the maximum intensity shifts towards
left. Here,

T_{2} > T_{1}

.

∴ λ_{m T_{2}} < λ_{m T_{1}}

But in plot (a)

λ_{m T_{2}} = λ_{m T_{1}}

,
in plot (b)

λ_{m T_{2}} > λ_{m T_{1}}

and in plot (d)

λ_{m T_{2}} > \cdot λ_{m T_{1}}

Therefore the correct plot is (c) where

λ_{m T_{2}} < λ_{m T_{1}}

.

Q. Shown below are the black body radiation curves at temperatures T1​ and T2​(T2​>T1​). Which of the following plots is correct?