8.(b) how will the radius of the Newton’s ring change if air is replaced by oil between the lens and glass plate? Explain it. A film of oil of refractive index 1.70 is placed between a plate and an equi-convex lens. The focal length of the lens is 1 metre. Determine the radius of the dark ring when the wavelength of the light used is 6000
8.(b) how will the radius of the Newton’s ring change if air is replaced by oil between the lens and glass plate? Explain it. A film of oil of refractive index 1.70 is placed between a plate and an equi-convex lens. The focal length of the lens is 1 metre. Determine the radius of the dark ring when the wavelength of the light used is 6000
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