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Question
The ratio of the frequencies of the long wave length its of Lyman Balmer series of hydrogen spectrum is
Options
27 : 5
5 : 27
4 : 1
1 : 4
MCQ
Solution
27 : 5
Explanation:
For Lyman series `1/(lambdam)` = `R(1/1^2 - 1/2^2) = (3R)/4`
For Ballmer series, `1/(lambdam)` = `R(1/2^2 - 1/3^2) = (5R)/36`
Divided `(lambdam)/(lambda^2m) xx (5R)/36 xx 4/(4R) = 5/27 (vm)/(v^1m) = 27/5`
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