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What should be the position of an object in front of a concave mirror to get a real image having the same size as that of the object ?

Aat F

Bbetween F and C

Cbetween F and P

Dat C

Answer:

D. at C

Read Explanation:

To get a real image of the same size as the object with a concave mirror, the object must be placed at the center of curvature (C).

This is one of the standard cases of image formation by a concave mirror. When an object is placed at the center of curvature:

  • Position of the image: The image is formed at the same position, which is also at the center of curvature (C).

  • Nature of the image: The image is real and inverted.

  • Size of the image: The image has the same size as the object.

Ray Diagram

Screenshot 2025-08-19 132531.png

As shown in the diagram, a ray of light parallel to the principal axis passes through the focus (F) after reflection. A ray of light passing through the focus (F) becomes parallel to the principal axis after reflection. These two reflected rays intersect at the center of curvature (C), forming an image of the same size as the object.

Therefore, the correct answer is (D) at C.


Related Questions:

A ray of light is incident on the pole of a concave mirror. The acute angle between the incident ray and the principal axis will be called?
An object is placed at a distance of 10 cm in front of a concave mirror. Its image is formed at a distance at 15 cm on the same side. The focal length of the mirror is?
An object placed 30 cm from a concave lens forms a virtual erect image at a distance of 10 cm from the lens. The magnification produced by the lens is?

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 concave mirror forms a real, inverted and same-sized image of an object. Where is the object placed?