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JEE Main202310 Apr 2023Morning ShiftPhysicsRay OpticsActual

An object is placed at a distance of 12 cm in front of a plane mirror. The virtual and erect image is formed by the mirror. Now the mirror is moved by 4 cm towards the stationary object. The distance by which the position of image would be shifted, will be

Options

  1. A4   cm towards mirror
  2. B8   cm towards mirror
  3. C8   cm away from mirror
  4. D2   cm towards mirror

Correct answer

B. 8   cm towards mirror

Step-by-step solution

When an object is placed in front of a plane mirror, object distance is equal to the image distance. In the first case, the image distance will be 12   cm from the mirror. In the next case, as the mirror is moved towards the object, the object distance becomes 8   cm . Hence, image distance will also be 8   cm .

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