Question

An object is placed at 7cm away from a plane mirror. At what distance will an image be formed from (a) the object and (b)the
mirror?

Answer 1

Given:

Distance of the object(O) = 7 cm.

To Find:

(a) The distance of the image from the object.

(b) The distance of the image from the mirror.

Solution:

The distance of the object from the mirror(O) = 7 cm.

We know that,

In case of a plane mirror, the distance of the object from the mirror = The distance of the image from the mirror.

Hence we get,

The distance of the image from the mirror = The distance of the object from the mirror = 7 cm.

(b) The distance of the image from the mirror is 7 cm.

(a) The distance of the image from the object _

(7+7)

= 14 cm.

Answer:

              (a) The distance of the image from the object is 14 cm.

              (b) The distance of the image from the mirror is 7 cm.