Tag: Lenses

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LENSES

A lens is made of a transparent material bounded by two spherical surfaces. The surfaces may be both convex, both concave or one convex and one concave etc. For a thin lens, the thickness of the lens is small compared to other dimensions like object distance. Two basic types are: (1) Convex lens – thicker […]

COMBINATION OF THIN LENSES IN CONTACT

Consider two lenses A and B of focal length f1 and f2 placed in contact with each other. The image of point object O will be at I1 formed by lens A, which act as a virtual object for second lens B producing the final image at I. since lenses are thin, therefore we assume […]