# Difference between Concave and Convex

The basic difference between concave and convex is that Concave refers to that curve or surface that resembles the inner part of a surface, that is, it presents a sunken part directed towards the observer. Convex is that curve or surface that presents a curve directed towards the observer.

## Concave

In geometry, concave refers to that curve or surface that resembles the inner part of the circumference or a sphere, this means that it presents a sunken part directed to the observer.

This term is used in mathematics and physics to refer to a type of angle that is generated before a curve, that is, where the internal cavity is generated.

This term also applies to mirrors. A concave mirror is one that has an inward curvature and that has certain utilities. They are used in telescopes and in those instruments used to see long distances.

**See also**: Convex mirror vs concave mirror

## Convex

It is an adjective used in mathematics and physics to describe something whose appearance is similar to the external face of a circle or sphere.

For economics, the term convexity represents a considerable resource for measuring the risk of an interest rate and is used to calculate at what rate the duration of a fixed-income instrument will change while its profitability changes.

In its application to the field of mirrors, we have that, a convex mirror is one that has an outward curvature and its function is to generate a wide view of the environment they reflect.

Read Also: real image vs virtual image

## Difference between concave and convex

- Concave is an adjective that defines those surfaces with a shape similar to the internal part of the curve of a sphere or circumference.
- Convex is an adjective that defines surfaces that have a shape similar to the outer part of a sphere or circumference.