Question

A boy with a mouth 5 cm wide stands 2 cm from a plane mirror. Where is his image and how wide is the image of the mouth:

Answer 1

Step 1: Given,

The width of the mouth of the boy is 5 cm

The distance from the mirror is 2 cm.

Step 2: Finding the image of the boy,

1. A plane mirror is defined as a smooth reflecting surface.
2. The image formed in a plane mirror is virtual
3. The image formed is as far behind the mirror as the object is in front.
4. Therefore, the image of the boy will be formed at 2 cm behind the mirror.

Step 3: Finding the width of the mouth's image,

1. The size of the image is equal to the size of the object in a plane mirror.
2. Therefore, the image of the boy's mouth is 5 cm wide.

Hence, the image of the boy will be 5 cm wide and will be formed at 2 cm behind the mirror.