An Observer Moves Towards A Stationary Plane Mirror At A Speed Of 4 Ms–1. With What Speed Will His Image Move Towards Him?  

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An observer moves towards a stationary plane mirror at a speed of 4 ms–1. With what speed will his image move towards him?  


Correct option is

Since the distance of the image from the mirror is equal to the distance of the object (observer) from the mirror at each instant of time during his motion, the speed of his image with respect to him is 4 + 4 = 8 ms–1.



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