Question

For a mirror , linear magnification $m$ comes out to be $+2$. What conclusions can be drawn from this?

• A. mirror is concave only.
• B. mirror can be convex or concave but it can not be plane mirror.
• C. object lies between pole and focus.
• D. object lies beyond focus.

Answer 1

Answer: (A), (C)

object lies between pole and focus.

Given,

Magnification $m=+2$

Since the magnification is greater than $1$ , spherical mirror considered should be a concave mirror.

When magnification is positive, we can say that, the image is erect.

A virtual ,erect and magnified image can only be formed by a concave mirror, when the object is placed between pole and focal point as shown below.




Hence, options (a) and (c) are the correct answers.