This video lecture from Atomic Structure (F.Sc. First Year Chemistry) covers the experiment performed by Davisson and Germer in which an electron beam from the electron gun was fired on to nickel crystal and it was diffracted which prove the dual nature of matter. 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.