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The ratio of the wavelengths for 2 rarr ...

The ratio of the wavelengths for `2 rarr 1` transition in `Li^(++), He^(+)` and `H` is

A

`1:2:3`

B

`1:4:9`

C

`2:9:36`

D

`3:2:1`

Text Solution

Verified by Experts

The correct Answer is:
C
`(1)/(lambda)=RZ^(2)((1)/(n_(1)^(2))-(1)/(n_(2)^(2)))rArrlambdaprop(1)/(Z^(2))`
`lambda_(Li^(++)):lambda_("He"^(+)):lambda_(H)=4:9:36`
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