Question

we wish obtain an erect image of an object use in a concave mirror of focal length of15cm what should be 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

Answer 1

If you wanted a erect image then in concave mirror then it is only one case when object is placed between pole and focus since you have to place ever object between 0 to 15 CM then are erect and virtual image will be formed behind the mirror.also the size of the image will be larger than the object .