1.

v_(1) is the frequency of the series limit of Lyman series, v_(2) is the frequency of the first line of Lyman series and v_(3) is the frequency of the series limit of the Balmer series. Then

Answer»

`v_(1)-v_(2)=v_(3)`
`v_(1)=v_(2)-v_(3)`
`1/v_(2)=1/v_(1)+1/v_(3)`
`1/v_(1)=1/v_(2)+1/v_(3)`

Solution :For Lyman series `v=RC[1/1^(2)-1/n^(2)]`,
where n=2,3,4,........
For the series limit of Lyman series `n=oo`
`v_(1)=RC[1/1^2-1/oo^(2)]=RC .........(i)`
For the first line of Lyman series n=2
`v_(2)=RC [1/1^(2)-1/2^(2)]=3/4RC ..........(II)`
For Balmar series `v=RC (1/2^(2)-1/n^(2))`
where n=3,4,5....
For the seris limit of Balmer series `n=oo`
`v_(3) =RC[1/2^(2)-1/oo^(2)]=(RC)/(4)...........(III)`
From EQUATIONS (i), (ii) and (iii), we get
`v_(1)=v_(2)+v_(3) rArr v_(1)-v_(2)=v_(3)`


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