Question

Assume, a person is standing in front of a plane mirror. The distance between the mirror and
his image is 5 m. If the person moves 2 m towards the plane mirror what would be the
distance between (a)the person and his image (b) image and the mirror?
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Answer 1

Answer:

(a) 3m (b) u guess it is 0m

Answer 2

Explanation:

In plane mirror, object distance and image distance are equal.

That is, v=u

v is the distance of image from mirror. u is the distance of object from mirror.

Given v=6 m so u = 6 m.

Therefore, total distance between object and image = v + u = 12 m.

Now as per question, person moves 2 m towards mirror, then,

v = u = 6 - 2= 4 m.

Thus, distance between the person and his image would be, 4 +4 = 8 m.

hope it will help you.