Differences between convex and concave lens

May 5, 2018

S.N	Convex lens	Concave lens
1.	It is thick in the middle but thin at the edges.	It is thin in the middle but thick at the edges.
2.	It converges the parallel rays of light falling on it.	It diverges the parallel rays of light falling on it.
3.	It has a real focus.	It has a virtual focus.
4.	The image formed can be real, virtual, enlarged or diminished based upon the position of object.	The image formed is always virtual, upright and diminished.
5.	It is also known as converging lens.	It is also known as diverging lens.
6.	Focal length is positive.	Focal length is negative.
7.	It is used to correct Hyperopia (farsightedness).	It is used to correct Myopia (nearsightedness).
8.	Convex means “curved or rounded like the outside of sphere”.	Concave means “hollowed or rounded”.
9.	It is used in eye, camera, overhead projector, focus sunlight, magnifying glasses, simple telescope, etc.	It is used in glasses, spy holes in door, some telescopes, back windows of some coaches, etc.
10.