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Q178) Total number of spectral lines in UV region, during transition from 5th excited state to 1st excited state


As 1st excited state means n1= 2 For 5th excited state means n2= 6 electron will transit between 6th level to 2nd level, whichisa Balmar series, is in visible range No transition will be upto 1st level. Because no line will appear in Lyman series i.e. UV region.