Hydrogen atoms in very high quantum state have been observed in radio astronomy. The wavelength of radiation emitted when hydrogen atom makes transition from `n = 110` state to `n = 109` state is `lambda = 5.8 cm`. Imagine a He atom in which one of the electrons has been excited to `n = 110` state. What will be wavelength of emitted radiation if the electron makes transition to `n = 109`?
