In Newton s ring experiment the diameter of the nth dark ring is 8 mm and that of the n 5 th dark ring is 12 mm If the radius of

Question

In Newton s ring experiment the diameter of the nth dark ring is 8 mm and that of the n 5 th dark ring is 12 mm If the radius of curvature of the plano convex lens is 10 m find the wave length of the light used

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