Question

The geometric centre of mirror is:

Answer 1

HintMirror is an important device to study the different phenomenon in optics. The following points are necessary to solve the problems related with the mirror as given below:
1) The knowledge of geometrical maths.
2) Basic points related to spherical shells.
3) Drawing practice.

 Complete step-by-step solution:
The mirror is of two types:

Spherical mirror is further divided into two parts:

Spherical mirror is a part of a sphere whose one surface is polished. Some basic terms related to the sphere like centre (C), radius (R), mid-point (P) on the surface. These terms have special meaning when discussion is made along with the mirror.
The mid-point on the surface of the mirror is an important geometrical function, that helps to specify the position of the object. This point is called the geometrical centre of the spherical reflecting surface. This point is also termed as Pole and denoted by P.

Note:- When we solve the problems related to mirror, it is necessary to have the knowledge of the following points:
1) Construction of mirrors.
2) Geometrical quantities in terms of mirror characteristics.
3) Relation between the mirror quantities like:$f = \dfrac{R}{2},{\text{ }}\dfrac{1}{f} = \dfrac{1}{v} + \dfrac{1}{u}$