Question

At which position on the principal axis of a concave mirror should an object be placed to get the image of the same size as the object?

• A. Between the pole and focus
• B. At the focus
• C. Between the focus and centre of curvature
• D. At the centre of curvature

Answer 1

The correct option is D

At the centre of curvature

Option D: At the centre of curvature

Explanation:

1. Two rays emerging from the object are one parallel to the principal axis and other passing through the focus of the mirror.
2. These rays after reflection from an image at point C.
3. The image formed has the same size as that of the object and it is real and inverted.

Hence, option D is correct.