Question

For an object at infinity, a concave mirror produces an image at its focus which is:

• A. enlarged
• B. virtual
• C. erect
• D. real, inverted and diminished

Hint:

For a concave mirror:

Object at infinity → image at focus
Nature: real, inverted, and highly diminished

Answer 1

The Correct Option is D

Step 1: Recall the ray diagram for a concave mirror. When an object is placed at infinity, the rays coming from it are parallel to the principal axis. Step 2: Formation of image. For a concave mirror, parallel rays converge at the principal focus after reflection. Step 3: Nature of the image formed. The image formed at the focus is:

Real
Inverted
Highly diminished (point-sized)
Step 4: Evaluate the options.

(A) Enlarged — incorrect
(B) Virtual — incorrect
(C) Erect — incorrect
(D) Real, inverted and diminished — correct ✔
Step 5: Final conclusion. The image formed is real, inverted and diminished. \[ \boxed{\text{(D)}} \]