Question

Chinmay observes his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between him and his image will be ________

• A. 3 m
• B. 5 m
• C. 6 m
• D. 8 m

Answer 1

The correct option is C

6 m

Characteristics of the image formed by the plane mirrors:

1. The size of the image formed by the plane mirror is the same as that of the object.
2. The image formed by a plane mirror is at the same distance from the mirror as the object is from the mirror.
3. The image formed is laterally inverted.

Application of the concept:

1. The distance between the mirror and the chinmay's image is$4m$. Therefore, the distance between him and the mirror is also $4m$.
2. He moves $1m$ toward the mirror means the distance between him and the mirror will be now$3m$.
3. The distance between his image and mirror will also be $3m$.
4. Therefore, the distance between him and his image is $3m+3m=6m$.

Hence, option C is correct.