Q. The transition from the state $n = 4$ to $n = 3$ in a hydrogen, like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition
A) $2 \rightarrow 1$
B) $3 \rightarrow 2$
C) $4 \rightarrow 2$
D) $5 \rightarrow 4$
Explanation
(d) The infrared radiations have lower energy than $uv$ radiations. Therefore, the only possible transition is from $n = 5$ to $n = 4$. As $n$ increases, difference of energy levels and hence energy emitted decreases
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.