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NEET Sample Paper NEET Sample Test Paper-73

  • question_answer
    A plane mirror is placed at the bottom of the tank containing a liquid of refractive index\[\mu \]. P is a small object at a height h above the mirror. An observer O-vertically above P outside the liquid see P and its image in the mirror. The apparent distance between these two will be

    A) \[2\mu h\]                                 

    B) \[\frac{2h}{\mu }\]

    C) \[\frac{2h}{\mu -1}\]                

    D) \[h\left( 1+\frac{1}{\mu } \right)\]

    Correct Answer: B

    Solution :

    Image formation by a mirror (either plane or spherical) does not depend on the medium. The image of P will be formed at a distance h below the mirror. If d= depth of liquid in the tank. Apparent depth of \[P={{x}_{1}}=\frac{d-h}{\mu }\] Apparent depth of the image of \[P={{x}_{2}}=\frac{d+h}{\mu }\] \[\therefore \] Apparent distance between P and its image \[=\,\,{{x}_{2}}-{{x}_{1}}=\frac{2h}{\mu }\]


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