The diagram above shows an incident ray A, inclined at angle of 50o to the…

Physics WAEC 1990

The diagram above shows an incident ray A, inclined at angle of 50o to the interface CB. The ray OB is found to lie along the surface. What is the refractive index of the medium X with respect to air?

  • sin50o/sin40o
  • sin40osin50o
  • sin90o/sin50o
  • sin40o/sin90o
  • sin90o/sin40o checkmark

The correct answer is: E

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