Question

A convex mirror has a focal length f. A real object is placed at a distance f in front of it from the pole produces an image at

• A. Infinity
• B. f
• C. $\frac{f}{2}$
• D. 2f

Answer 1

The correct option is C $\frac{f}{2}$

By using $\frac{1}{f}=\frac{1}{v}+\frac{1}{u}\Rightarrow \frac{1}{+f}=\frac{1}{v}+\frac{1}{-f}\Rightarrow v=\frac{f}{2}$