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The wavelength of a vertain line in Balm...

The wavelength of a vertain line in Balmer series is observed to be 4341Ã…. To what valu of 'n' does this correspond? `(R_(H)=109678cm^(-1))`.

Text Solution

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`(1)/(lamda)=R_(H)[(1)/(2^(2))-(1)/(n^(2))]`
`(1)/(n^(2))=(1)/(4)-(1)/(lamdaxxR_(H))`
`=(1)/(4)-(1)/(4341xx10^(-8)xx109678)`
`=0.04` ltbgt `n^(2)=(1)/(0.04)=25`
or `n=5`.
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