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A great video lecture conducted by experienced physics teacher on 12th class physics chapter 20 topic20.1 explain laser. Get full understanding or ask any questions.

Explain Laser, ch 20, lec 20.5, Explain Laser - Inter Part 2 Physics

18:00

Neon Laser and Uses of Laser, ch 20, lec 20.5, Explain Laser - Inter Part 2 Physics

11:14