This video lecture from Atomic Structure (F.Sc. First Year Chemistry) covers the Spectral lines of the Hydrogen Spectrum and its origin according to the Bohr’s Atomic Model. Calculation of Wave number of various spectral lines from Hydrogen Spectrum is discussed along with the derivation of the expression. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.