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JEE Main & Advanced Physics Ray Optics Question Bank Critical Thinking

  • question_answer
    A double convex lens, lens made of a material of refractive index \[{{\mu }_{1}}\], is placed inside two liquids or refractive indices \[{{\mu }_{2}}\] and \[{{\mu }_{3}}\], as shown. \[{{\mu }_{2}}>{{\mu }_{1}}>{{\mu }_{3}}\]. A wide, parallel beam of light is incident on the lens from the left. The lens will give rise to 

    A)            A single convergent beam

    B)            Two different convergent beams

    C)            Two different divergent beams

    D)            A convergent and a divergent beam

    Correct Answer: D

    Solution :

                       As \[{{\mu }_{2}}>{{\mu }_{1}},\] the upper half of the lens will become diverging. As \[{{\mu }_{1}}>{{\mu }_{3}},\] the lower half of the lens will become converging


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