What are the differences between plane mirror and spherical mirror?

Answer 1

A plane mirror is flat, so your image is the same size as you.

A spherical mirror is curved. If concave it can be used either to focus an image as in a reflecting telescope, or magnify as in a shaving/makeup mirror. If convex you get a smaller wide-angled image, as in a car's wing mirror

Answer 2

Plane mirrors have a flat reflective surface, while spherical mirrors have a curved reflective surface. Plane mirrors produce images that are virtual, upright and the same size as the object, whereas spherical mirrors can produce both real and virtual images that may be magnified or reduced in size. The focal point of a plane mirror is at infinity, whereas spherical mirrors have a specific focal point where light rays converge (concave mirror) or diverge (convex mirror).