In your earlier classes, you have studied different types of curved mirrors, such as parabolic and spherical mirrors.
A spherical mirror's reflecting surface can be curved inwards or outwards.
A concave mirror is a spherical mirror with a reflecting surface that is curved inwards, facing the centre of the sphere. A convex mirror is a spherical mirror with a curved reflecting surface that faces outwards.
You may now realise that the spoon's curved inwards surface can be compared to a concave mirror, while the bulged surface of the spoon can be compared to a convex mirror.
Spherical mirrors:In the case of curved mirrors, the reflecting surface is a part of the surface of a sphere. Such mirrors whose reflecting surfaces are spherical in nature are called Spherical mirrors.
The reflecting surface is curved inwards in some spherical mirrors; that is, it faces towards the centre of the sphere. They are called Concave mirrors.
The mirrors used in vehicle headlights, Reflecting telescopes, Torch lights and shaving mirrors
Concave mirrors in vehicle headlights
The reflecting surface is curved outward in some kind of spherical mirror. They are called Convex mirrors.
The rear side mirror of vehicles, Optical instruments and safety mirrors
The rear side mirror of a car