MCQ
Hydrogen (H), deuterium (D), singly ionized helium ($He^+$) and doubly ionized lithium (Li) all have one electron around the nucleus. Consider n =2 to n = 1 transition. The wavelengths of emitted radiations are $\lambda 1,\lambda 2, \lambda 3$ and $\lambda 4$ respectively. Then approximately
- ✓$\lambda_1=\lambda_2=4 \lambda_3=9 \lambda_4$
- B${ }_4 \lambda_1=2 \lambda_2=2 \lambda_3=\lambda_4$
- C$\lambda_1=2 \lambda_2=2 \sqrt{2} \lambda_3=3 \sqrt{2} \lambda_4$
- D$\lambda_1=\lambda_2=2 \lambda_3=3 \sqrt{2} \lambda_4$
