In H atom if the electron moves from nth orbit to 1st orbit by transition in multi steps, then the total number of lines observed in the spectrum are 10, then find out the value of n.

A certain electronic transition from an excited state to Ground state of the Hydrogen atom in one or more steps gives rise to 5 lines in the ultra violet region of the spectrum.How many lines does this transition produce in the Infra red region of the spectrum?

In a hydrogen spectrum if electron moves from 6th to 2nd orbit by transition in multi steps then find out the number of lines in spectrum

In a hydrogen spectrum if electron moves from 7 to 1 orbit by transition in multi steps then find out the total number of lines in the spectrum.

Calculate the ratio of maximum wave length of Lyman & Balmer series ?