Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source (λ = 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:
Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source (λ = 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:
Option 1 -
2 nm
Option 2 -
2.05 µm
Option 3 -
2.87 nm
Option 4 -
1.27 µm
Asked by Shiksha User
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1 Answer
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Correct Option - 4
Detailed Solution:ΔP = dsinθ = dθ
dy/D = (10? ³ × 1.270mm)/1m = 1.27µm
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