Question

Number of possible spectral lines which may be emitted in bracket series in h atom

Answer 1

Answer:

Number of spectral lines is get by using below formula

=$\frac{(n_{2}-n_{1} )(n_{2}-n_{1})+1   }{2}$

Here n2 is the high level from which the electron comes=13

so,

Number of spectral lines=

$=\frac{(13-4)(13-4+1)}{2}$

$=\frac{9*10}{2}$

=45