When space between the glass plate and the convex lens in Newton's ring setup is filled with liquid, the radius of fringes is reduced to 80% of the original value, the refractive index of the liquid is:
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In Newton's ring experiment, the space between the plano-convex lens and the flat glass is filled with a liquid of refractive index n1=1.80 and the radius ..
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Answer: The diameter of Newton's rings is inversely proportional to refractive index. Therefore when a drop of water is introduced between the glass plate and plano-convex lens in Newton's rings, the ring system contacts.
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