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JEE Main & Advanced Physics Ray Optics Question Bank Self Evaluation Test - Ray Optics and Optical Instruments

  • question_answer
    A mango tree is at the bank of river and one of the branch of tree extends over the river. A tortoise lives in river. A mango falls just above the tortoise. The acceleration of the mango falling from tree appearing to the tortoise is (Refractive index of water is 4/3 and the tortoise is stationary)

    A) g

    B) 3g/4  

    C) 4g/3     

    D) None of these

    Correct Answer: C

    Solution :

    [c] \[\frac{x}{1}=\frac{{{x}_{rel}}}{\mu }\Rightarrow {{x}_{rel}}=\mu x\] \[\Rightarrow \frac{{{d}^{2}}{{x}_{rel}}}{d{{r}^{2}}}={{\mu }^{2}}\frac{{{d}^{2}}x}{d{{r}^{2}}}\Rightarrow {{a}_{rel}}=\mu g\]


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