Identify the position of the object in a concave mirror if the image size is enlarged with virtual and erect nature and its position is behind the mirror?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Between P (Pole) and F (Focus)
A concave mirror forms a real, inverted image in front of the mirror for every position of the object except one. When the object is between the pole P and the focus F, the reflected rays spread out and only appear to meet behind the mirror, so the image is virtual, erect and enlarged, formed behind the mirror. This is why a concave shaving or make-up mirror held close shows a large, upright face.
Why the other options are incorrect
Option (2) At infinity — Incorrect. The image is real, inverted and highly diminished, a point at the focus.
Option (3) Between the C (Center of Curvature) and F (Focus) — Incorrect. The image is real, inverted and enlarged, formed beyond C in front of the mirror.
Option (4) At the Center of Curvature (C) — Incorrect. The image is real, inverted and of the same size, formed at C.