If the magnification of a mirror is +1, then the type of mirror is:

(a) Plane mirror
(b) Convex mirror
(c) Concave mirror
(d) None of the above



Answer :

To determine the type of mirror based on the magnification provided, we need to understand how magnification works for different types of mirrors.

1. Magnification and Plane Mirrors:
- A plane mirror always creates an image that is the same size as the object.
- This means the magnification (M) for a plane mirror is always +1.
- Hence, if the magnification is +1, it implies that the mirror is producing an image equal in size to the object.

2. Magnification and Concave Mirrors:
- A concave mirror can produce different magnifications depending on the position of the object relative to the focal point of the mirror.
- The magnification can be greater than 1, less than 1, or even negative, but it generally is not exactly +1 for most object positions.

3. Magnification and Convex Mirrors:
- Convex mirrors always produce images that are smaller than the actual object.
- This results in a magnification (M) that is less than +1, and it is never +1.

Given that we know the magnification is exactly +1, this aligns with the characteristics of a plane mirror and not with either convex or concave mirrors.

Therefore, the type of mirror is:
(a) Plane mirror