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A bus driver is observing the image of a...

A bus driver is observing the image of a car in his rear view (side) mirror. How does the size of the image change when the car approaches the bus?

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The mirror used in vehicles as rear view mirror is convex. So, when the object is at a large distance from the mirror, image will be at the focus, i.e., a diminsihed image is obtained. When the object approaches nearer and nearer, the size of image increases. So, size of the image of car in the mirror gradually increases.
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