In Fig. 33-78, where n1 = 1.70, n2 = 1.50, and n3 = 1.30, light refracts from material 1 into material 2. If it is incident at point A at the critical angle for the interface between materials 2 and 3, what are?
(a) The angle of refraction at point B
(b) The initial angle θ? If, instead, light is incident at B at the critical angle for the interface between materials 2 and 3, what are
(c) The angle of refraction at point A
(d) The initial angle θ? If, instead of all that, light is incident at point A at Brewster's angle for the interface between materials 2 and 3, what are
(e) The angle of refraction at point B
(f) The initial angle θ?

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