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

Hydrogen atoms are excited from ground state to the principal quantum number 5. Number of spectral lines observed will be

Atomic hydrogen is excited to the nth energy level . The maximum number of spectral lines which it can emit while returning to ground state,is:

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

Hydrogen atoms are excited from ground state of the principle quantum number 4 . Then the number of spectral lines observed will be

The electron in hydrogen atom in a sample is in n^(th) excited state, then the number of differrent spectrum lines obtained in its emission spectrum will be

Hydrogen atom in ground state is excited by a monochromatic radiation of lambda = 975 Å . Number of spectral lines in the resulting spectrum emitted will be

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

When a hydrogen atom is excited from ground state to first excited state then

When a hydrogen atom is excited from ground state to first excited state, then