SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 cm
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4 cm
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10 cm
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22 cm
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Detailed explanation-1: -An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is 4 cm.
Detailed explanation-2: -An object is placed 20 cm in front of a plane mirror then the image is formed at 20 cm behind the mirror. If the mirror is moved 2 cm toward the object. Hence, The total distance between the positions of the original and final image is 4 cm.
Detailed explanation-3: -The object is placed at 20 cm in front of the convex mirror and the plane mirror is 12 cm from the plane mirror. The image of the object formed will be virtual. Therefore the image formed will be at positionv=−u=−12. Where u’ is the object distance v’ is the image distance and f’ is the focal distance.