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In a double slit experiment the angular ...

In a double slit experiment the angular width of a fringe is found to be `0.2^(@)` on a screen placed I m away. The wavelength of light used in 600 nm. What will be the angular width of the fringe if the entire experimental apparatus is immersed in water ? Take refractive index of water to be `4//3`.

A

`0.2^(@)`

B

`0.27^(@)`

C

`0.3^(@)`

D

`0.15^(@)`

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The correct Answer is:
D
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