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NEET Sample Paper NEET Sample Test Paper-45

  • question_answer
    The focal length of a concave mirror is f and the distance from the object to the principle focus is x. The ratio of the size of the image to the size of the object is -

    A) \[\frac{f+x}{f}\]                       

    B) \[\frac{f}{x}\]

    C) \[\sqrt{\frac{f}{x}}\]                              

    D) \[\frac{{{f}^{2}}}{{{x}^{2}}}\]

    Correct Answer: B

    Solution :

    \[\frac{I}{O}=\frac{f}{f-u}\,;\,\,\,where\,\,u\,=\,f+x\,\,\,\,\therefore \frac{I}{O}\,\,=\,\,-\frac{f}{x}\]


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