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A beam of light consisting of red, green and blue colours is incident on a right-angled prism on face A B . The refractive indices of the material for the above red, green and blue colours are 1.39,1.44 and 1.47 respectively. A person looking on surface A C of the prism will see

Options

  1. Ano light
  2. Bgreen and blue colours
  3. Cred and green colours
  4. Dred colour only

Correct answer

D. red colour only

Step-by-step solution

For light to come out through face 'AC', total internal reflection must not take place. aligned & i.e., < c < c & < 1 aligned or < 1 < 1 45^ < 2 < 1.414

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