The diagram above shows an incident ray A incli... - WAEC Physics 1990 Question
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?
A
sin50o/sin40o
B
sin40osin50o
C
sin90o/sin50o
D
sin40o/sin90o
correct option: e
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