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A spherical ball of transparent material...

A spherical ball of transparent material has index of refraction`mu.` A narrow beam of light AB is aimed as shown. What must the index of refraction be in order that the light is focused at the point C on the opposite end of the diameter from where the light entered? Given that `xgt gtR.`

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Knowledge Check

  • A parallel beam of light falls on a solid tranparent sphere. Q. For what value of refractive index mu , the thin beam can be focussed at centre of sphere.

    A
    1.5
    B
    2
    C
    2.5
    D
    none of these

  • A parallel beam of light emerges from the opposite surface of the sphere when a point source of light lies at the surface of the sphere. The refractive index of the sphere is

    A
    `3/2`
    B
    `5/3`
    C
    `2`
    D
    `5/2`

  • A parallel beam of light emerges from the opposite surface of the sphere when a point source of light lies at the surface of the sphere. The refractive index of the sphere is

    A
    `(3)/(2)`
    B
    `(5)/(3)`
    C
    `2`
    D
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