(Solved): 12) a) Calculate the wavelength of the light that is emitted when the electron in a hydrogen atom ...

12) a) Calculate the wavelength of the light that is emitted when the electron in a hydrogen atom drops from \( \mathrm{n}=9 \) to \( \mathrm{n}=6 \). b) What wavelength would be emitted if this electron were in a \( \mathrm{B}^{4+} \) ion instead of a hydrogen atom? Calculate the wavelength.