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 A doubly ionised Lithium atom is excited from its ground state (n=1) to n=3 state. The wavelengths of the spectral lines for corresponding transition are given by λ32,λ31 and λ21. The  value of λ32λ31 and Λ21λ31 are respectively

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a
8.1, 0.67
b
8.1, 1.2
c
6.4, 1.2
d
6.4, 0.67

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detailed solution

Correct option is C

1λ=R1n12−1n22⇒1λ32=536R⇒λ32=365R  Similarly λ31=98R&λ21=43R ∴ λ32λ31=6.4 and λ21λ31=1.2

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Similar Questions

In a sample of ions, a Li++ ion electron in first Bohr orbit is excited to a level by a radiation of wavelength λ. When the ion gets de-excited to the ground state in all possible ways (including intermediate emissions), a total of six spectral lines are observed. What is the value of λ ?

 (Given, h=6.63×1034Js,c=3×108ms1

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