when a convex lens of radius of curvature 30 cm is kept in contact with another lens , a beam of parallel rays which is parallel to principal axis passes through this combination without any deviation. Find the angle of deviation produced by the two lenses individually when a light ray which is parallel to the principal axis strikes the edge of the lens and draw the ray diagrams.
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Radius of curvature of lens is the radius of the hollow sphere of glass of which the lens is a part. Each lens has two radii of curvature. From this formula we can say that focal length of lens is inversely proportional to refractive index of material of lens medium.
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