how is it my sign .
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The two applications of a convex lens are:-
It is used as an objective lens in a telescope, camera, slide projector, etc.
With its short focal length it is also used as a magnifying glass.
The two applications of a concave lens are:-
A person suffering from short sightedness or myopia wears spectacles having concave lens.
A concave lens is used as eye lens in a Galilean telescope to obtain an erect final image of the object.
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