If the inner side of the spherical mirror is reflecting is called a concave mirror
If the outer side of the spherical mirror is reflecting it is called convex mirror

Concave Mirror:
A concave mirror is a mirror with a reflecting surface that curves inward. It is also known as a converging mirror because parallel rays of light that strike the surface converge or come together after reflection. Concave mirrors are commonly used in various devices such as telescopes, shaving mirrors, and headlights.

Convex Mirror:
A convex mirror is a mirror with a reflecting surface that curves outward. It is also known as a diverging mirror because parallel rays of light that strike the surface diverge or spread out after reflection. Convex mirrors are commonly used in rear-view mirrors of vehicles and in security mirrors to provide a wider field of view.

Differences between Concave and Convex Mirrors:

Shape:
- Concave mirrors have a reflecting surface that curves inward.
- Convex mirrors have a reflecting surface that curves outward.

Reflection of Light:
- Concave mirrors reflect light in such a way that parallel rays converge or come together at a point called the focal point.
- Convex mirrors reflect light in such a way that parallel rays diverge or spread out, giving a wider field of view.

Image Formation:
- Concave mirrors can form both real and virtual images, depending on the position of the object relative to the mirror.
- Real images are formed when the object is placed beyond the focal point, and these images can be projected onto a screen.
- Virtual images are formed when the object is placed between the focal point and the mirror, and these images cannot be projected onto a screen.
- Convex mirrors always form virtual images that are smaller and upright compared to the actual object. These images cannot be projected onto a screen.

Field of View:
- Concave mirrors have a smaller field of view compared to convex mirrors. They can magnify objects but only within a limited range.
- Convex mirrors have a wider field of view, allowing for a greater perception of the surrounding environment. However, they produce smaller images.

Uses:
- Concave mirrors are used in devices where magnification is required, such as telescopes and shaving mirrors.
- Convex mirrors are used in rear-view mirrors of vehicles and in security mirrors to provide a wider field of view.

In conclusion, the main difference between concave and convex mirrors lies in their shape, the way they reflect light, image formation, field of view, and their respective uses. Understanding these differences helps in utilizing the appropriate mirror for specific applications.