This video lecture from Atomic Structure (F.Sc. First Year Chemistry) covers the discovery of proton/positive rays, the experimental performance by Goldstein in which perforated cathode was used and presence of positive rays was observed. The properties of positive rays are also discussed in the video. 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.