The ratio of the wavelengths for 2 ® 1 transition in Li++, He+ and – McqOptions

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1.	The ratio of the wavelengths for 2 ® 1 transition in Li++, He+ and H is [UPSEAT 2003]
A.	1 : 2 : 3
B.	1 : 4 : 9
C.	4 : 9 : 36
D.	3 : 2 : 1
Answer» D. 3 : 2 : 1

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