Question

The unit of magnification is

• A. $m$
• B. $m^2$
• C. $m^{-1}$
• D. none of these

Answer 1

The correct option is D

none of these

The explanation for the correct option: (D) None of these

1. Magnification of a mirror is defined as the ratio of the height of the image formed by the mirror to the height of the object.
2. So, magnification has no unit because it is the ratio of the same dimension.

The explanation for the incorrect options:

In the case of option A:

Meter($m$) is the unit of distance.

In the case of option B:

$m^2$ is the unit of area

In the case of option C:

$m^{-1}$ is the unit of the inverse of length.

Hence the correct option is (D)