Question

In case of a real and inverted image, the magnification created by mirror is
$A.$ Positive
$B.$ Negative
$C.$ Unity
$D.$ Infinity

Answer 1

Hint: Image formed by a mirror is said to be real if the image is on the same side of the object. This means its position is negative. As far as inverted is concerned, when the image formed is oriented opposite to the actual object then the image is said to be virtual. Height of the image is considered to be negative.

Formula used:
Magnification, $M=\dfrac{{{h}_{i}}}{{{h}_{o}}}$

Complete step by step answer:

Magnification of a mirror is the ratio between the height of the image (${{h}_{i}}$) to the height of the object (${{h}_{o}}$).
$M=\dfrac{{{h}_{i}}}{{{h}_{o}}}$
For a real and inverted image, the height of the image is negative and the height of the object is positive. So the magnification of the mirror is negative.

Hence the correct option is B.

Additional Information:
A concave mirror is also known as a converging mirror. It has a reflecting surface that is bent away from the incoming light. Concave mirrors concentrate light inward to one focal point. They are used to focus light. Depending upon the distance between the object and the mirror, a concave mirror can provide different types of images.

Note:
Concave mirrors are used in reflecting telescopes. They are also used to provide a magnified image when the object is placed between focus and the pole. So such mirrors can be used for make up or shaving. Concave mirrors are used to produce a beam of light by gathering light from a smaller source. For example torches, headlamps, spotlights and concentrated solar power furnaces.