8 Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source 632 8 nm The

Question

8 Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source 632 8 nm The distance between the screen and the slits is 100 cm If a bright fringe is observed on a screen at distance of 1 27 mm from the central bright fringe then the path difference between the waves which are reaching this point from the slits is close to 1 2 87nm 2 2 nm

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