Question

Neha who is 145 cm tall stood at a distance of 3.5m away from a plane mirror-
a) What will be the height of her image?
b) What will be the distance between Neha and her image if she moves 1m towards the image

Answer 1

a. the height of her image will be 145 cm as the image formed in plane mirror is same as the real image..
b. the distance between Neha and her image after she walked 1 m is 3.5m- 1m = 2.5m

Answer 2

(a) The height of her image is 145 cm

(b) The distance between Neha and her image is 2.5 m.

Explanation:

In case of plane mirror, the image distance is equal to the object distance i.e. the image is formed at the same distance at which the object is placed.

Height of Neha is 145 cm and she stood at a distance of 3.5 m away from a plane mirror.

(a) The height of the image is same as the height of the object in plane mirror. So, the height of her image is 145 cm.

(b) If she moves 1 meter towards her image. Then, the Neha and the mirror become 3.5 m - 1 m = 2.5 m. So, the distance between Neha and her image is 2.5 m.

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Plane mirror

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