Question

Converging rays strike a spherical convex mirror such that they can form the image in the absence of mirror between pole and focus. Which of the following is a characteristic of the final image formed by mirror?

• A. Real
• B. Virtual
• C. Erect
• D. Inverted

Answer 1

Answer: (B), (C)

Virtual
Erect

In this case, object is virtual. So object distance is positive.

Using mirror formula:

$\frac{1}{v}+\frac{1}{u}=\frac{1}{f}$

$\frac{1}{v}=-\frac{1}{u}+\frac{1}{f}$

$v<0$

Image is formed on the left of the mirror and hence, the image is virtual.

Magnification for a spherical mirror is given by:

$m=\frac{-v}{u}>0$

Hence, it is erect , Options $B,C$ are correct.