Question

Uses of various types of lenses

Answer 1

1.concave lens=it is used in spectacles of those people who suffer from near sightedness
2.convex lens-it is used as magnifying glass and in spectacles of those who suffer from far sightedness

these are the only type of lenses available

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Answer 2

There are two types of Lens -
1 Concave Lens -  Used in magnifying glass , car side mirror's .
2. Convex Lens -  Magnifying Lens.