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Combinations of Lenses & Mirrors

When a drop o...

Question

When a drop of water is introduced between the glass plate and plano-convex lens in Newton's rings system, the ring system

A

Contracts

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B

Expands

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C

Remains same

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D

First expands then contracts

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Solution

The correct option is B Contracts
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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