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Question
The wavelength of the first time line of Ballmer series is 6563 A°. The Rydberg constant for hydrogen is about:-
Options
1.09 × 107 per m
1.09 × 108 per m
1.09 × 109 per m
1.09 × 105 per m
MCQ
Solution
1.09 × 107 per m
Explanation:
`1/lambda = R(1/2^2 - 1/3^2) = Rpi 5/36`
R = `36/(5pi)` ⇒ `3/(5 xx (6365 xx 10^-10))` = 1.09 × 107 per m.
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