1.

Ratio of the wavelengths of line of Lyman series and first line of Balmer series is.

Answer»

`1:3`
`27:5`
`5:27`
`4:9`

Solution : For first line of Lyman SERIES `(1)/(lambda_(L))= R[(1)/((1)^(2)) - (1)/((3)^(2))] =(3R)/(4)`
ANDFOR FIRSTLINE of Balmer series `(1)/(lambda_(B)) = R[(1)/((2)^(2)) - (1)/((3)^(2))] =(5R)/(36)`
`RARR (lambda_(L))/(lambda_(B)) = (5)/(27)`


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