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,
A) $T_{3} > T_{2} > T_{1}$
B) $T_{1} > T_{2} > T_{3}$
C) $T_{2} > T_{3} > T_{1}$
D) $T_{1} > T_{3} > T_{2}$
Explanation
(d) According to Wien’s law
$\lambda_{m} \propto \frac{1}{T}$
And from the figure
$\left( \lambda_{m} \right)_{1} < \left( \lambda_{m} \right)_{3} < \left( \lambda_{m} \right)_{2}$
Therefore, $T_{1} > T_{3} > T_{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.