The curved surface of a shining spoon can be considered as a curved mirror, similar to the reflecting surfaces of certain types of mirrors.

A spherical mirror is a type of mirror whose reflecting surface can be considered as a part of the surface of a sphere. The reflecting surface of such mirrors is curved and forms a portion of a spherical shape.

Mirrors whose reflecting surfaces are spherical are referred to as spherical mirrors. This designation is derived from the fact that the curved reflecting surface can be conceptualized as forming part of a sphere.

A concave mirror has a reflecting surface that is curved inwards, facing towards the center of the sphere, while a convex mirror has a reflecting surface that is curved outwards.

The surface of a spoon, curved inwards, can be likened to a concave mirror, and the surface bulged outwards can be compared to a convex mirror.