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A light ray is incident at 45° on a glass block immersed
inside a liquid of refractive index nį = 1.33 as shown in
the figure below. In this configuration, the refractive
ray skims the bottom surface. Determine the refractive
index of the glass, ng.
ng
45°
1.66
1.55
O 1.69
1.49
1.63
1.58

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