The refractive index of a medium relative to air is 1.8. Calculate the critical angle…

Physics WAEC 1996

The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree.

  • 18o
  • 34o checkmark
  • 45o
  • 68o
  • 90o.

The correct answer is: B

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