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

To obtain an erect image of an object in a concave mirror, the object is to be held between pole and principal focus of the mirror. Therefore, range of distance of the object from the mirror must be less than `15 cm`. The image will be erect and virtual. The size of image would be larger than the size of the object. For ray diagram refer to fig.