Ray Optics

JEE Main level, single correct, medium

7 of 295

Question 7 of 295

An object is placed at a distance of 12cm12cm in front of a plane mirror. The virtual and erect image is formed by the mirror. Now the mirror is moved by 4cm4cm towards the stationary object. The distance by which the position of image would be shifted, will be

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Answer: (B) 8cm8cm towards mirror


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 12cm12cm from the mirror. In the next case, as the mirror is moved towards the object, the object distance becomes 8cm8cm. Hence, image distance will also be 8cm8cm.

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