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If the shortest wavelength of H-atom in ...

If the shortest wavelength of H-atom in Lyman series is `x`, then longest wavelenght in Balmer series of `He^(2+)` is :

A

`(x)/(4)`

B

`(5x)/(9)`

C

`(6x)/(5)`

D

`(9x)/(5)`

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The correct Answer is:
D
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