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Physics · Oct / Nov 2023 · Paper 11 · Question 20

5054Refraction of light

Which statement is correct?

  1. ATotal internal reflection only occurs when light travels from air into glass.
  2. BThe larger the refractive index of glass, the larger is the critical angle.
  3. CWhen total internal reflection occurs, the angle of incidence is equal to the angle of reflection.
  4. DWhen total internal reflection occurs, the angle of incidence is less than the critical angle.

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Correct answer: C. When total internal reflection occurs, the angle of incidence is equal to the angle of reflection.

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