An atom has x energy level , then total number of lines in its spectrum are :

(a) A hydrogen atom is excited by radiation of wavelength 97.5 nm. Find the principal quantum number of the excited state. (b) Show that the total number of lines in emission spectrum is (n(n-1))/2 and compute the total number of possible lines in emission spectrum.

In a sample of H like atoms highest quantum state is n = 6. Find total number of spectral lines in emission spectrum

Hydrogen atom excites energy level from n = 3 to ground state. Number of spectrum lines according to Bohr, is ......

A hydrogen atom is excited up to 9th level. The total number of possible spectral lines emitted by the hydrogen atom is

Total number of radius in the 5th energy level is