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?

The diagram above shows an incident ray A, inclined at angle of 50^o 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?

A sin50^o/sin40^o
B sin40^osin50^o
C sin90^o/sin50^o
D sin40^o/sin90^o
E sin90^o/sin40^o

waec 1990 physics

The correct answer is E. sin90^o/sin40^o

No explanation given

Previous question Next question