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If 9.9 eV energy is supplied to H atom, the no. of spectral lines emitted is equal to-
9.9 eV taken to be approx. as 10 then number of spectral lines could be =>n(n-1)/2 = 10we get,n^2 – n -20 = 0 on solving the quadratic we get, n = 5.5 spectral lines are possibly emitted. Hope it helps RegardsArun (askIITians forum expert)
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