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Hydrogen H, deuterium D, singlyionized h...

Hydrogen H, deuterium D, singlyionized helium `He^(+)` and doubly ionized lithium `L^(++)` all have one electron around the nucleus. Consider `n=2` and `n=1` transition. Thewavelengths ofthe emitted radiations are `lamda_(1),lamda_(2),lamda_(3) and lamda_(4)` respectively. Then approximately:

A

`lamda-(1)=2lamda_(2)=2sqrt(2)lamda_(3)=3sqrt(2)lamda_(4)`

B

`lamda_(1)=lamda_(2)=2lamda_(3)=3lamda_(4)`

C

`lamda_(1)=lamda_(2)=4lamda_(3)=9lamda_(4)`

D

`4lamda_(1)=2lamda_(2)=2lamda_(3)=lamda_(4)`

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