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 Form 3 Physics Refraction of Light Questions and Answers

Figure 13 shows a semicircular glass block placed on a bench. A ray of light is incident at point O as shown. The angle of incidence, i, is just greater
than the critical angle of glass.
A drop of water is now placed on the bench so as to make contact with the glass at point O. Sketch on the same figure the path followed by the ray after placing the drop of water.

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