Question

The distance, between the object and its image, in a plane mirror is 6 m. IF the object moves 1 m towards the mirror, then the (new) distance between the object and its image will be-
4 m 6 m
5 m
8 m​

Answer 1

Answer:4 m

Explanation: its because initially the distance between image and object was 6 cm. it means object is 3 m away from the mirror [as its a law that the distance between object and mirror and mirror and image is always equal in a plane mirror.]so when it is placed 1 m foreward so image will also be form 1 m closer.{6-(1+1)} =6-2 =4m.

thanks.

Answer 2

The (new) distance between the object and its image will be 4 m  if distance, between the object and its image, in a plane mirror was 6 m object  moved 1 m towards plane mirror

Given : The distance between the object and its image on plane mirror is 6 m.

the object moves 1 m towards the mirror

To Find :  The (new) distance between the object and its image

Solution:

Assume that plane mirror is at origin

and Object is on +ve  x axis then Image will be at - ve x axis

Let say Originally object at    a ,

then image is at  - a

Distance = a -(-a) = 2a

=> 2a = 6 m

=> a = 6 m

Hence object is 3 m from  plane mirror

the object moves 1 m towards the mirror,

Hence Distance of object from mirror  = 3 - 1  = 2m

Now object shifted to  2

then image is at  - 2

Distance =2 -(-2) = 4

=> 2b =  8 m

The (new) distance between the object and its image will be 4 m

The (new) distance between the object and its image will be 4 m  if distance, between the object and its image, in a plane mirror was 6 m object  moved 1 m towards plane mirror

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