TS EAMCET 19-July-2022 Shift 2 Solved Paper

In a double-slit experiment performed in air the angular width of a fringe is found to be 0.15∘ on a screen placed 80cm away. The wavelength of light used is 490nm. The angular width of the fringe if the entire apparatus is immersed in a medium of refractive index ‌

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