An object us placed 20 Cm in front of a plane mirror. The mirror I moved 2 Cm towards the object. The distance between the positions of the original and final images seen in the mirror is ??
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Answer:
4 cm
Explanation:
An object us placed 20 cm in front of a plane mirror.
Distance between mirror and object is 20 cm. As per given condition, mirror moved 2 cm towards the object.
Therefore,
The distance between mirror and object is 20 - 2 i.e. 18 cm.
To find the distance between the positions of the original and final images seen in the mirror.
As mirror was moved, means it also moves 2 cm away from the original image.
Hence, the distance between the positions of the original and final images seen in the mirror is sum of distance between mirror & object and distance between mirror & image.
= 2 + 2 = 4 cm
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