Question

A spider hangs by a strand of silk at an eye level 20 cm in front of a plane mirror. You are behind the spider, 65 cm from the mirror. Find the distance between your eye and the image of the spider in the mirror.

Answer 1

The image distance is equal to the object distance:

Distance between the spider and mirror = 20cm

So, the image is formed 20cm inside the mirror

Distance between the person and mirror = 65cm

Distance between the image and person = 65+20= 85cm