Whenever a hydrogen atom emits a photon in the Balmer series
It need not emit any more photon
It may emit another photon in the Paschen series
It must emit another photon in the Lyman series
It may emit another photon in the Balmer series
Whenever a photom is emitted by hydrogen in Balmer series, it is followed by another photon in Lyman series. What wavwlength does this latter photon correspond to ?