JEE Main 2022 Physics question
In a Young's double slit experiment, an angular width of the fringe is 0.35° on a screen placed at 2 m away for particular wavelength of 450 nm. The angular width of the fringe, when whole system is immersed in a medium of refractive index 7/5, is . The value of is .
Answer: 4
Solution
The angular fringe width is , so . In the medium $λ ' = λ
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