6th Class Science Lights and Sound Question Bank Light

  • question_answer A plane mirror is in front of you in which you can see your image. It is approaching towards you at a speed of 10 cm/sec then at what speed will your image approach you?

    A) 10 cm/sec       

    B)         5 cm/sec

    C) 20 cm/sec     

    D) 15 cm/sec

    Correct Answer: C

    Solution :

        For a plane mirror, the object velocity is equal and opposite to the image velocity. Hence, if the mirror is moving with velocity v, then velocity between two is 2v, which is in this case \[2\times 10=20cm/sec.\]          

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