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What will be the effect on the fringes formed in Young’s double-slit experiment if the apparatus is immersed in water?

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in Physics – Class 12 by (135k points)
What will be the effect on the fringes formed in Young’s double-slit experiment if the apparatus is immersed in water?

(a) Increases

(b) Decreases

(c) Remains the same

(d) Independent

This question was addressed to me in an online quiz.

I'm obligated to ask this question of Wave Optics in division Wave Optics of Physics – Class 12

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Correct answer is (b) Decreases

The best I can explain: The wavelength of light in water (λ’ = \(\frac {\lambda }{\mu }\)) is less than that in air. When the apparatus is immersed in water, the fringe width decreases. This is the impact experienced by the apparatus when immersed in water.

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