Question

In which of the following cases does a concave mirror form a real image?

1. (i) Object placed between focus and pole
2. (ii) Object placed at infinity
3. (iii) Object placed at focus

• A. All
• B. None of these
• C. 2, 3
• D. 2 only

Answer 1

Answer:

C. 2, 3

• Both (ii) and (iii).

• A concave mirror is a reflective surface that curves inward, and the reflecting surface is on the inner side of the curve.

• The center of the curve is known as the focus.

• When an object is placed at the focus of a concave mirror, the reflected rays diverge and do not intersect.

• However, if an object is placed beyond the focus, the reflected rays converge to form a real image.

• When an object is placed at infinity, the reflected rays are parallel, and they converge at the focus after reflection.

• As a result, an image is formed at the focus, but it is not a real image.

• It is a virtual image.

• When an object is placed beyond the focus of a concave mirror, the reflected rays converge to form a real image.