Grade 7 | Science | Image formation- Plane mirror and Spherical mirror, Light, Olympiad, CBSE, ICSE, SOF, ITO
If the reflecting surface of the mirror is flat then we call this type of mirror as plane mirrors. Light always has a regular reflection on plane mirrors.
Characteristics of the image formed by a plane mirror
1. The image formed is laterally inverted.
2. The image formed is of the same size as of the object.
3. The image formed is always erect.
4. The image formed is always virtual.
5. The distance of the object from the mirror is equal to the distance of the image from the mirror.
Uses of a plane mirror
1. Plane mirrors are used at home in bathrooms and dressing rooms as looking glass.
2. Such mirrors are commonly used in kaleidoscope, periscope and solar cooker.
3. Plane mirrors are used to give a false dimension in showrooms, by fixing them on the walls .
A spherical mirror is a mirror which has the shape of a piece cut out of a spherical surface. There are two types of spherical mirrors: concave, and convex. The most commonly occurring examples of concave mirrors are shaving mirrors and makeup mirrors. As is well-known, these types of mirrors magnify objects placed close to them. The most commonly occurring examples of convex mirrors are the passenger-side wing mirrors of cars. These type of mirrors have wider fields of view than equivalent flat mirrors, but objects which appear in them generally look smaller (and, therefore, farther away) than they actually are.