Calculate the wavelength for the emission transition if it starts from the orbit having radius 1.3225 nm and ends at 211.6 pm . Name the series to which this transition belongs and the region of the spectrum.

Explanation

Given the radius of orbit from which it started `=1.35225xx10^(-9)m=13.225Å`
In general radius of orbit `=0.529xxn^(2)Å`
`n^(2)=(13.225)/(0.529)=25`
`n^(2)=25impliesn=5`
Given that the
Radius of orbit at which the transition ended = 211.6 pm
`211.6xx10^(-12)m`
`=2.116Å`
Similarly as above
`n^(2)=(2.116)/(0.529)=4`
`n^(2)=4impliesn=2`
`:.` transition takes place from n = 5 to n = 2-level
`:.` spectral lines are obtained in Balmer series (visible region)