ThermodynamicsEasy
Question
The plots of intensity versus wavelength for three black bodies at temperature T1, T2 and T3 respectively are as shown. Their temperatures are such that
Options
A.T1 > T2 > T3
B.T1 > T3 > T2
C.T2 > T3 > T1
D.T3 > T2 > T1
Solution
Wien′s displacement law for a perfectly black body is
λmT = constant = Wien′s constant b
Here, λm is the minimum wavelength corresponding to maximum intensity I.
or λm ∝
From the figure (λm)1 < (λm)3 < (λm)2
Therefore, T1 > T3 > T2
λmT = constant = Wien′s constant b
Here, λm is the minimum wavelength corresponding to maximum intensity I.
or λm ∝
From the figure (λm)1 < (λm)3 < (λm)2
Therefore, T1 > T3 > T2
Create a free account to view solution
View Solution FreeMore Thermodynamics Questions
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio...One mole ideal gas is compressed adiabatically at 27oC. Its temperature becomes 102oC. The work done in this process wil...Supposing the distance between the atoms of a diatomic gas to be constant, its specific heat at constant volume per mole...A thermodynamic system is taken through the cycle abcda. The work done by the gas along the path $bc$ is:...A sample of 0.1 g of water at 100oC and normal pressure (1.013 ×105 Nm-2) requires 54 cal of heat energy to convert...