The frequency of the first line in Lyman series in the hydrogen spectrum is v. What is the frequency of the corresponding line in the spectrum of doubly ionized Lithium?
A
v
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B
3v
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C
9v
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D
27v
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Solution
The correct option is C9v We know that, frequency, v∝Z2
For a doubly ionized lithium, Z = 3 ∴ Frequency of the corresponding line in the spectrum of doubly ionized Lithium, v′=32v=9v
Hence, the correct choice is (c).