Question

what is the difference between covex lens and concave lens?why it is difficult to compare with concave mirror and convex mirror?

Answer 1

convex mirror har polish on inner side and concave on outer side

Answer 2

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When an object is near a plane mirror, the image is erect, virtual and of the same size at the object. A concave mirror gives a magnified and erect image of a nearby object whereas a convex mirror gives an erect and diminished image. For the rear view mirror in a car.