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Light and Optics: Flint Glass Prism

A flint-glass prism is made in the shape of a 30 degree-60 degree-90 degree triangle. Red and violet light are incident on the prism at right angle to it's vertical side. The index of refraction n red= 1.66, n violet = 1.70. What angle does each ray make with the horizontal when it emerges from the prism?

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The law of refraction says:

n1 sin(angle1) = n2 sin(angle2)

where n1 is the index of ...

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