MCQ
Electron in Hydrogen atom first jumps from third excited state to second excited state and then from second excited state to first excited state. The ratio of the wavelengths $\lambda _1 : \lambda _2$ emitted in the two cases respectively is $............$
- ✓$\frac{27}{5}$
- B$\frac{20}{7}$
- C$\frac{27}{20}$
- D$\frac{7}{5}$