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Since a plano-convex lens is being used in Newton's Rings .. that's why=the fringes are seen circular from above, on the glass plate.=

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Beulah Skiles

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3y ago

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Why cornu's fringes are hyperbolic and newtons rings are circular?

Cornu's fringes are hyperbolic because they are formed due to the interference of light waves that are not perfectly spherical when they meet at an angle. Newton's rings are circular because they are formed by the interference of light waves that are spherical in shape due to reflection between a flat glass surface and a convex lens.


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