define concave and convex mirror
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If the inner side of the spherical mirror is reflecting, it is called a concave mirror. If the outer side of the spherical mirror is reflecting, it is called a convex mirror. Image. Concave mirrors can form inverted and real images and also virtual and erect images.
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Convex lens: it is thicker in middle than at edges
It is a converging lens
It produces real image
Treat to hypermetropia
Concave lens:thinner in middle
Diverging
Virtual
Myopia
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