Question

how do convex and concave lenses look like ????​

Answer 1

*Convex Lens : In a convex lens (sometimes called a positive lens), the glass (or plastic) surfaces bulge outwards at the centre. A convex lens is also called a converging lens because the parallel light rays moving through it curves inward and touches (converges) at a position just beyond the lens known as the focal point.

* Concave Lens : With external surfaces curving inside, a concave lens is just the opposite, making parallel light rays curve outwardly or diverge. Therefore concentric lenses are sometimes referred to as divergent lenses. The disparity between concave and convex lenses will clearly be understood when contemplating the concave lens internally.

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