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The shortest wavelength in hydrogen spec...

The shortest wavelength in hydrogen spectrum of Lyman series when `R_(H)=109678 cm^(-1)` is

A

`1002.7 Å`

B

`1215.67 Å`

C

`1127.30 Å`

D

`911.7 Å`

Text Solution

Verified by Experts

The correct Answer is:
D
For Lyman series, n =1 and for shortest wave length `n = prop`
`:. bar(v) = (1)/(lambda) =R_(H)[(1)/(1^(2))-(1)/(alpha^(2))] = 109678 cm^(-1)`
`lambda =(1)/(109678)cm = 911.7 xx 10^(-8) = 911.7 Å`
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