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The frequency of second line of Balmer s...

The frequency of second line of Balmer series in spectrum of `Li^(​+2)`​ ion is :-

A

`(3RC)/(16)`

B

`(5RC)/(4)`

C

`(27RC)/(16)`

D

`(RC)/(16)`

Text Solution

Verified by Experts

The correct Answer is:
C
`1/(lambda)=R xx 3^(2)((1)/(2^2)-(1)/(4^2))`
`(v)/(c)=R x 3^2((4-1)/(4^(2)))`
`v=(R xx C xx 27)/(16)`
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