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  1. For a ray of light to suffer total internal reflection it has to pass from :

  2. A.

     Glass to water

    B.

     Water to glass

    C.

     Air to water

    D.

     Air to glass

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    Answer : Option C

    Explanation :

    Total internal reflection is an optical phenomenon that happens when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface. This can only occur where light travels from a medium with a higher [n1=higher refractive index] to one with a lower refractive index [n2=lower refractive index]. Total internal reflection can be seen at the air-water boundary.


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