Question

what is a lens and types of lenses? ​

Answer 1

Answer:

there are two lenses called concave and convex . lens means a part of spherical mirror

Answer 2

➠ AnSwer :-

• A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.
• A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses, usually arranged along a common axis.

• There are two main types of lenses, known as convex (or converging) and concave (or diverging).