The ratio of the wavelength of the last line of Balmer series and the last line of Lyman series is :

The ratio of the wavelength of the last line of Balmer series and the

1.	The ratio of the wavelength of the last line of Balmer series and the last line of Lyman series is :
Answer» `2.5 :1` `3.5 :1` `4.5 :1` `5.5 :1` SOLUTION :`bar(upsilon) = R [1/(1^2) -1/(n^2)]` n=2 for `16(ST)` line , n = 3 for `2^(nd)` line n = 4 for `3^(rd)` line , on SOLVING ratio is `2.5:1`