Question

if you wish to take a picture of your image while standing 5 metres in front of a plane mirror, for what distance should you set your camera to provide sharpest focus???​

Answer 1

Given data :

1. An object is 5m in front of a plane mirror

to find : distance should for camera to provide sharpest focus

solution :

• as we all know that image generated by the plane mirror is always virtual, upright, and at the same distance from the mirror as the item, with the same shape and size, and 5m behind the mirror.

=> 5m + 5m = 10 m

∴10m is the total distance between the object and the image

Hence, we should set the camera's focus to 10m