Q. The radiation energy density per unit wavelength at a temperature $T$ has a maximum at a wavelength $\lambda_{0}$. At temperature $2T$, it will have a maximum at a wavelength

A) $4\lambda_{0}$
B) $2\lambda_{0}$
C) $\lambda_{0}/2$
D) $\lambda_{0}/4$
Explanation

(c) $\because\lambda_{m}T = \lambda_{m}^{'}T^{'} \Rightarrow \lambda_{0}T = \lambda^{'} \times 2T \Rightarrow \lambda^{'} = \frac{\lambda_{0}}{2}$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.