In Young's double slit arrangement, slits are separated by a gap of 0 . 5 mm , and the screen is placed at a distance of 0 . 5 m from them. The distance between the first and the third bright fringe formed when the slits are illuminated by a monochromatic light of 5890 A o is :-

Question

In Young's double slit arrangement, slits are separated by a gap of 0 . 5 mm , and the screen is placed at a distance of 0 . 5 m from them. The distance between the first and the third bright fringe formed when the slits are illuminated by a monochromatic light of 5890 A o is :-, 1178 × 10 – 9 m, 1178 × 10 – 6 m, 1178 × 10 – 12 m, 5890 × 10 – 7 m

MARKS App · Accepted Answer

β = λ D d = 5890 × 10 - 10 × 0 . 5 0 . 5 × 10 - 3 = 589 × 10 - 6 m Distance between first and third bright fringe is 2 β = 2 × 589 × 10 - 6 m = 1178 × 10 - 6 m

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