22)calculate the wavelength of the H alpha line of hydrogen spectrum .the energy levels of hdrogen atom are given by the expression En=-(13.6/n^2)eV.
ans is 6547.6 armstrong

Question

22)calculate the wavelength of the H alpha line of hydrogen
spectrum the energy levels of hdrogen atom are given by the
expression En=-(13 6/n^2)eV
ans is 6547 6 armstrong

Ved Prakash Lakhera · Accepted Answer

For Hα line spectrum of hydrogen atom n=3, threfore ,   E3=-13
632=-1 51 eV=-1 51×1 6×10-19=-2 416×10-19J
But hc/λ = 2
416×10-19   or           λ = 6
62×10-34×3×1082 416×10-19 = 8
12×10-7m
     or       λ = 8124 A°

22)calculate the wavelength of the H alpha line of hydrogen spectrum .the energy levels of hdrogen atom are given by the expression En=-(13.6/n^2)eV. ans is 6547.6 armstrong

22)calculate the wavelength of the H alpha line of hydrogen spectrum .the energy levels of hdrogen atom are given by the expression En=-(13.6/n^2)eV.
ans is 6547.6 armstrong