## What is concave and convex?

Concave means “hollowed out or rounded inward” and is easily remembered because these surfaces “cave” in. The opposite is convex meaning “curved or rounded outward.” Both words have been around for centuries but are often mixed up.

### What is concave and convex mirror definition?

Spherical mirrors whose inner side is reflecting are called concave mirrors. Spherical mirrors whose outer side is reflecting are called convex mirrors.

#### What is convex and concave lens?

Lenses may be divided broadly into two main types: convex and concave. Lenses that are thicker at their centers than at their edges are convex, while those that are thicker around their edges are concave. A light beam passing through a convex lens is focused by the lens on a point on the other side of the lens.

**What is concave and convex images?**

Convex mirrors have a reflecting surface that bulges outwards, whereas concave mirrors have a reflecting surface that bulges inwards. In other words, convex mirrors produce smaller images, and concave mirrors create larger images.

**What do you mean by convex?**

Definition of convex 1a : curved or rounded outward like the exterior of a sphere or circle. b : being a continuous function or part of a continuous function with the property that a line joining any two points on its graph lies on or above the graph.

## What do you mean by concave?

1 : hollowed or rounded inward like the inside of a bowl a concave lens. 2 : arched in : curving in â€”used of the side of a curve or surface on which neighboring normals to the curve or surface converge and on which lies the chord joining two neighboring points of the curve or surface. concave. noun.

### What is called concave mirror?

A concave mirror is also known as converging mirror because it converges the incident rays parallel to the principal axis to the focus of the mirror after reflection. Concave mirrors reflect light inward to one focal point.

#### Why are mirrors convex?

These features make convex mirrors very useful: since everything appears smaller in the mirror, they cover a wider field of view than a normal plane mirror, so useful for looking at cars behind a driver’s car on a road, watching a wider area for surveillance, etc.