Question

In a concave mirror when the object is located beyond C the magnification is

Answer 1

Radius of curvature and linear magnification

1. The radius of the sphere from which the lens is formed is called the radius of curvature of the lens.
2. The radius of curvature is denoted by 'C'.
3. Linear magnification is defined as the ratio of image distance to object distance.
4. Linear magnification, $m=\frac{v}{u}$, where v and u are the image distance and object distance.

Magnification when object is located beyond C

1. When the object AB is located beyond the radius of curvature, then an inverted image (B^'A^') with a negative linear magnification value.
2. The image will be produced at the point between the focus (F) and C (radius of curvature). So, object distance $>$image distance, that's why magnification $<$1.

Diagram

So, in a concave mirror when the object is located beyond C the magnification is less than one.