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The ratio of the frequencies of the long wavelength limits of Lyman and Balmer series of hydrogen spectrum is

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a
27 : 5
b
5 : 27
c
4 : 1
d
1 : 4

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detailed solution

Correct option is A

For Lyman seriesvLymen=cλmax=Rc112−122=3RC4For Balmer seriesvBalmer=cλmax=Rc122−132=5RC36∴vLymenvBalmer=275


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