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The wavelength of second Balmer line in...

The wavelength of second Balmer line in Hydrogen spectrum is 600 nm. The wavelength for its third line in Lymann series is

A

800 nm

B

600 nm

C

400 nm

D

200 nm

Text Solution

Verified by Experts

Wavelength of second Balmer line is given by,
`1/lambda_(B)=R(1/2^(2)-1/4^(2))`
`rArr 1/(600nm)=R times 3/16 rArr R=16/(1800nm)" …(i)"`
Wavelength of third line of Lyman series,
`1/lambda_(l)=R(1/1^(2)-1/4^(2))=15/16R`
`=15/16 times 16/(1800nnm) rArr lambda=120 nm`
(*) None of the given options is correct.
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