Difference between concave and convex

The difference between concave and convex lies in our view of curvature:

• when the curvature is inward, we say it is concave;
• when the curvature is outward, we say it is convex.

We use the words concave and convex to describe the shape or curved lines, usually in the area of ​​science: mathematics, physics, among others. Concave and convex are antonyms, that is, opposite terms.

Concave	Convex
Definition	Something that is curved inward.	That which presents an outward curve.
Etymology	Latin concavus: excavated, cavity	Latin convexus: rounded surface.
Applications	Concave lenses: telescopes Concave mirrors	Convex lenses: microscopes, magnifying glasses Convex mirrors
Examples	Water meniscus Cup cavity Inside of a parachute Armpit shape Craters Interior rear view mirror	Mercury Meniscus External surface of a cup Parachute exterior Shoulder shape Hills Driver's side rearview mirror

Concave

The term "concave" is applied to that which has an internal curvature. It is used to describe shapes with cavities, such as the concavity of the skull, a set of bones that protect the brain.

Concave mirrors are those that look sunken and are generally used to reflect larger images.

Convex

The term "convex" is applied to that which has a rounded shape that protrudes. It is used to describe the circular outer surfaces, such as the outer surface of the skull, that gives the head the rounded shape.

Safety mirrors used at low visibility street corners or in shopping centers They are convex mirrors, which produce a reduced image due to the way light is reflected from them.