MCQ
The frequency of radiation emitted when the electron falls from $n = 4$ to $n = 1$ in a hydrogen atom will be (Given ionization energy of $H$ $ = 2.18 \times {10^{ - 18}}J\,\,\,{\rm{ato}}{{\rm{m}}^{ - 1}}$ and $h = 6.625 \times {10^{ - 34}}\,Js)$
- ✓$3.08 \times {10^{15}}{s^{ - 1}}$
- B$2.00 \times {10^{15}}{s^{ - 1}}$
- C$1.54 \times {10^{15}}{s^{ - 1}}$
- D$1.03 \times {10^{15}}{s^{ - 1}}$
