A Plane convex lens is put on a glass plate such that the convex surface of the lens touches the plane surface of the plate. An oil drop is put in between. The radius of curvature of the convex surface of the lens is 200 cm and the refractive index of both the lens and the plate is 1.52. The refractive index of oil is 1.58 and the wavelength of light used is 5000 A. a. Find the radius of the 5th bright ring for normal incidence.
A Plane convex lens is put on a glass plate such that the convex surface of the lens touches the plane surface of the plate. An oil drop is put in between. The radius of curvature of the convex surface of the lens is 200 cm and the refractive index of both the lens and the plate is 1.52. The refractive index of oil is 1.58 and the wavelength of light used is 5000 A. a. Find the radius of the 5th bright ring for normal incidence.
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A Plane convex lens is put on a glass plate such that the convex surface of the lens touches the plane surface of the plate. An oil drop is put in between. The radius of curvature of the convex surface of the lens is 200 cm and the refractive index of both the lens and the plate is 1.52. The refractive index of oil is 1.58 and the wavelength of light used is 5000 A.
a. Find the radius of the 5th bright ring for normal incidence.
b. Find the number of dark rings that can be observed in Newton's rings experiment if the radius of the lens is 2 cm.
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