Multiple choice

Total internal reflection of light can occur only when light passes

  1. from a denser to a rarer medium

  2. from a rarer to a denser medium

  3. from one medium to another of equal refractive index

  4. from one medium to another of equal absorption
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A Correct answer
Explanation

Total internal reflection of light can occur only when light passes from a denser to a rarer medium. 

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