Question

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

पर्याय

• 1.09 × 10⁷ per m

• 1.09 × 10⁸ per m

• 1.09 × 10⁹ per m

• 1.09 × 10⁵ per m

Answer 1

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.