Why fringes are circular in newton's ring?
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Explanation:
The phenomenon of Newton's rings is an interference pattern caused by the reflection of light between two surfaces - a spherical surface and an adjacent flat surface.
The brightness or darkness depends on the height of air column between the spherical surface and the adjacent flat surface.
The locus of all points on the flat surface which are having the same height of air column is a circle whose center is the center of contact of the two surfaces.
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fringes are circular in newton's ring because he wanted to observe the thing and also because of heat
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