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JEE Main & Advanced Physics Ray Optics Question Bank Refraction at Curved Surface

  • question_answer
    A plane convex lens is made of refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is                                            [CBSE PMT 1999;  Pb. PMT 1999; BHU 2001; Very Similar to BHU 2003]

    A)            50 cm                                      

    B)            100 cm

    C)            200 cm                                    

    D)            400 cm

    Correct Answer: B

    Solution :

               \[f=\frac{R}{(\mu -1)}=\frac{60}{(1.6-1)}=100\ cm.\]


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