The first spectral line in the Pfund ser...

The first spectral line in the Pfund series of Hydrogen spectrum is given by
`(R_(H)=" Rydberg constant")`

A

`(9R_(H))/(400)`

B

`(56R_(H))/(36)`

C

`(11R_(H))/(900)`

D

`(7R_(H))/(144)`

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The correct Answer is:

D

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