MHT CET 2026 Physics question
In Young's double slit experiment the angular width of a fringe is found to be 0.2 on a screen placed 1m away. The wavelength of light used in 600 nm. If the entire apparatus is immersed in water of refractive index 4/3. the angular width of the fringe will be
Answer: (B)
Solution
The angular fringe width is . When the whole apparatus is immersed in a liquid of refractive index , the wavelength becomes while the slit separation is unchanged, so
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