Question

When the real image in a concave mirror of focal length of an object at the position $A$ is formed at $A$ itself, then the distance between the mirror and the object will be:

• A. $f$
• B. Greater than $2f$
• C. $2f$
• D. Less than $2f$

Answer 1

Answer: (C)

$2f$

When an object is placed, at the center of curvature of the concave mirror, the image is formed at the center of curvature.