Magnification Formula
The magnification which is represented by the letter small m produced by a spherical mirror can be expressed or represented as:
Where the letter h is the height of the image and h’ is the height of the object.
Magnification is also equal to the ratio of the image distance from the pole of the mirror to the object distance taken from the pole of the mirror.
As the object lies always above the main principal axis, the height of the object is taken always as positive. But the sign for the image height may change according to the type of image formed in case of any type of mirror chosen. The height of the virtual images formed should be taken as positive while the height of the real images formed should be taken as negative.
Mirror Formula and Magnification
The light gets reflected or refracted from the surfaces or medium. Any surface which is polished or in other words shiny always acts like a mirror be it of any kind. The observation of light bouncing off or getting back from the surfaces is termed as reflection. The light after the case of reflection travels or follows in the same medium from where the ray was incident on the surface. This phenomenon of reflection does not intend to change the velocity of light it only reverses the direction of light incident on it. This can be observed on any surface which is rough or smooth. The path of the reflected ray will depend upon the extent of smoothness of the surface, in the case of a smooth surface the reflected ray emerges with the same angle as of incidence and in the latter case suffers irregular reflection and so the reflected ray doesn’t emerge same as that of incidence angle. On the other view, light can also change its speed when traveling from one medium to another which is known as refraction of light.