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  5. Light - Reflection and Refraction

10th Class Science Light - Reflection and Refraction Question Bank Light Reflection and Refraction

  • question_answer
    A man standing at a position X in front of a plane mirror, a distance of y metre from the mirror as shown in figure. When the man moves 5 m away from the mirror, the new distance between the man and his image becomes 20 metre. What is the value of y?

    A) 5 m                              

    B) 10 m    

    C)        20 m                

    D)        40 m

    Correct Answer: A

    Solution :

    New distance between the man and the mirror = y + 5 \[\therefore \]The distance between the man and his image \[(y+5)\times 2=20\] 2y+ 10=20 2y= 10 y = 5 m


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