Question

We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

Answer 1

Object distance range: \(0\ cm\) to \(15\ cm\)
A concave mirror produces an erect image when the object is positioned between its pole (P) and principal focus (F).
Therefore, to get an erect image from a concave mirror with a focal length of 15 cm, the object must be placed between the pole and the focus. The resulting image will be virtual, erect, and magnified, as depicted in the accompanying figure.