Question

A vessel is filled with oil as shown in the diagram. Aray of light from point at the bottom of vessel is inciden
on the oil-air intergace at point p and grazes the surface along PQ. The refractive index of the oilis close to
a) 1.41
b) 1.50
c) 1.63
d) 1.73
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Answer 1

Answer:

c is the right answer 1.63.