(a) What is the angle of refraction at side A, relative to the normal? (b) At the side the internal ray goes to, side C, what is the angle of incidence? (c) At side C, does the internal ray undergo total internal reflection? Explain. Calculate and include the pertinent critical angle in your explanation.

(a) What is the angle of refraction at side A, relative to the normal? (b) At the side the internal ray goes to, side C, what is the angle of incidence? (c) At side C, does the internal ray undergo total internal reflection? Explain. Calculate and include the pertinent critical angle in your explanation.

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