Question

an object is placed at a distance of 20cm in front of a plane mirror. the mirror is moved to 2cm towards the object. What is the distance between the position of the original image and the final image
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Answer 1

Answer:

4 cm

Explanation:

let mirror is at x=0 initially

then image will be at -20

finally mirror is at x=2

image will be ar 2 -18 = -16

difference -20 -(-16) = -4

Answer 2

Answer:

4 cm

Explanation:

let mirror is at x=0 initially

then image will be at -20

finally mirror is at x=2

image will be ar 2 -18 = -16

difference -20 -(-16) = -4