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Q.

The wavelength of the Hα line in the Balmer series of the hydrogen atom is λ The wavelengthof the same line in doubly ionized lithium is

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a

λ9

b

λ8

c

λ27

d

λ2

answer is A.

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Detailed Solution

For a given set of n1 and n∵1λ=RZ21n12−1n22∴λHeλH=Z2ZHe2=132⇒λHe=λH9=λ9
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