Question

different between cancave and canvex

Answer 1

the mirror whose reflecting surface is concave is called concave and the mirror whose reflecting surface is convex is called convex mirror

Answer 2

Convex lenses are thicker at the middle. ... Rays of light that pass through the lens are spread out (they diverge). A concave lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus.
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Concave and convex mirror

(1) The reflecting surface of the concave mirror is bulged inwards. But the reflecting surface of the convex mirror is bulged outwards. (2)Concave mirror produces real and inverted images (except when the object is placedbetween pole and focus.