The width of the fringes obtained in the Young's double slit experiment is 2.6 mm when light of wave length 6000^{\circ} {\A} is used. If the whole apparatus is immersed in a liquid of refractive index 1.3 the new fringe width will be :

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The width of the fringes obtained in the Young's double slit experiment is 2.6 mm when light of wave length 6000∘A is used. If the whole apparatus is immersed in a liquid of refractive index 1.3 the new fringe width will be :

2.6 mm
5.2 mm
2 mm
4 mm

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