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A new application of Newtons rings experiment

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This experiment demonstartes a method to calculate the thickness of a thin film ( say a paper strip) using the phenomenon of interference.

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Solution Summary

A new application of Newton's ring experiment is determined. The phenomenon of interference are provided.

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When a monochromatic beam of light falls normally on a Plano-convex lens kept on an optically plane glass plate, concentric bright and dark circular fringes are formed. This is due to the interference of light waves reflected from the lower surface of the lens and the upper surface of the plane glass plate.
Formation of a bright or dark fringe at a point depends on the thickness of the air film at that point (which creates path difference).

Proposed Novel Experimental Method ...

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