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The wavelength of the first time line of Ballmer series is 6563 A°. The Rydberg constant for hydrogen is about:- -

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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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