Question

what is a lens ? name the two type of lenses .​

Answer 1

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 (elements), usually arranged along a common axis.

There are two main types of lenses, known as convex (or converging) and concave (or diverging). In a convex lens (sometimes called a positive lens), the glass (or plastic) surfaces bulge outwards in the center giving the classic lentil-like shape.

Answer 2

Answer:

$\bf\red{Question}$

What is a lens ? name the two type of lenses .

$\bf\red{Answer}$

Lens is a piece of glass which is a transparent substance and is used to form image of an object.

Two types of lens are:-

• Concave lens
• Convex lens