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Convex  lenses  are  also  used  in  spectacles  to  correct  the  vision  problem
               hypermetropia.




               Formation of Image by a Concave Lens

               After refraction, an incident ray of light from an object parallel to the principal axis
               of a concave lens appears to come from its focus.






















               An incident ray of light that passes through the optical center exits the lens with no
               deviation.





















               Class X Science                                 www.vedantu.com                                                          36
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