Question

An object is placed in front of the concave mirror at its focus. When an object moves from focus towards infinity the real image…….

• A. moves from centre of curvature towards focus.
• B. moves from focus towards centre of curvature.
• C. moves from infinity towards focus.
• D. moves from focus towards pole.

Answer 1

The correct option is C moves from infinity towards focus.

An object is at focus and a real image is formed at infinity. As it is between F and C the image is moved from infinity towards C. An object at C image is formed at C. An object moves from C towards infinity, the image moves towards F. When an object is at infinity an image is formed at F.