1.

Calculate the wave number for thelongest wavelength transition in the Balmer series of atomic hydrogen.

Answer»


Solution :For BALMER series, `bar(v) = 109, 677 ((1)/(2^(2)) - (1)/(n^(2))) cm`
`lamda` will be maximum or `bar(v)` is minimum `(bar(v) = (1)/(lamda)) " for " n = 3`. The value will be
`bar(v) = 109, 677 cm^(-1) ((1)/(2^(2)) - (1)/(3^(2))) = 109, 677 XX (5)/(36) cm^(-1) = 15232.9 cm^(-1) = 1.523 xx 10^(6) m^(-1)`


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