Q. The absolute temperatures of two black bodies are $2000\ K$ and $3000\ K$ respectively. The ratio of wavelengths corresponding to maximum emission of radiation by them will be

A) 2 : 3
B) 3 : 2
C) 9 : 4
D) 4 : 9
Explanation

(b) $\lambda_{m}T = \lambda_{m}^{'}T^{'} \Rightarrow \frac{\lambda_{m}}{\lambda_{m}^{'}} = \frac{T^{'}}{T} = \frac{3000}{2000} = \frac{3}{2}$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

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