This video lecture from Atomic Structure (F.Sc. First Year Chemistry) covers the concept of the dual nature of matter, the contribution of de Brgolie and the calculation of its wavelength, its derivation and the examples of a revolving electron and a stone of 1 gram moving at a speed o 10m/s to relate the concept on microscopic and macroscopic bodies. 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.