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Calcualte the limiting wavelengths of Ba...

Calcualte the limiting wavelengths of Balmer Series.

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`bar(v) = (1)/(lambda) =R((1)/(n_(1)^(2))- (1)/(n_(2)^(2)))`
`implies(1)/(lambda) =R((1)/(2^(2))-(1)/(n^(2)))`
For `1st` Line `( 3 rarr2)` transition
`implies (1)/(lambda)=109678 ((1)/(2^(2))-(1)/(3^(2)))`
`implies (1)/(lambda)= 109678((1)/(4)-(1)/(9))`
`implies (1)/(lambda)= ( 109678xx5)/(9 xx4)`
`implieslambda= ( 4 xx 9)/( 109678xx 5) cm = ( 4xx9 xx 10^(8))/( 109678xx5)Å`
`implies lambda= 6565Å`
For last line `( oo rarr 2)` transition
`implies(1)/(lambda)= 109678 ((1)/(2^(2))-(1)/(oo^(2)))`
`implies lambda = (4)/(109678) cm= ( 4 xx 10^(8))/( 109678) Å`
`implies lambda 3647Å`
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