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Questions  

Ratio of the wavelengths of first line of Lyman series and first line of Balmer series is

a
1 : 3
b
27 : 5
c
5 : 27
d
4 : 9

detailed solution

Correct option is C

1λ=R1n12−1n22For first line of Lymen series n1 = 1 and n2= 2For first line of Balmer series n2= 2 and n2= 3So, λLymenλBalmen=527

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