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

The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree.
  • A.
    18o
  • B.
    34o
  • C.
    45o
  • D.
    68o
  • E.
    90o.
Correct Answer: Option B
Explanation
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