Convex lens Concave lens

Convex lens	Concave lens
i.              A convex lens has its surfaces bulging outward. ii.            It is thicker in the middle than at the edges. iii.           It can form a real image as well as virtual image.	i.              A concave lens has its surfaces curved inward. ii.            It is thicker at the edges than in the middle. iii.           It can form only a virtual image.