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Spherical Lenses

Name the two ...

Question

Name the two kinds of lens. Draw diagrams to illustrate them.

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Solution

Lenses are of two types
(a)Convex or converging lens
(b)Concave or diveging lens

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How does the action of a convex lens differ from that of a concave lens on a parallel beam of light incident on them ? Draw diagrams to illustrate your answer.

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