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Question
The Balmer series in the hydrogen spectrum corresponds to the transition from n1 = 2 to n2 = 3, 4,.......... This series lies in the visible region. Calculate the wave number of line associated with the transition in Balmer series when the electron moves to n = 4 orbit. (RH = 109677 cm–1)
Solution
`bar(v) = R_H (1/n_1^2 - 1/n_2^2)cm^-1`
= `109677 (1/2^2 - 1/4^2)`
= `109677 (1/4 - 1/16)`
= 20564.44 cm–1
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