A ray \( P Q \) is incident normally on the face \( A B \) of a triangular prism of refracting a...
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47A ray \( P Q \) is incident normally on the face \( A B \) of a triangular prism of refracting angle of \( 60^{\circ} \), made of a transparent material of refractive index \( \frac{2}{\sqrt{3}} \), as shown in the figure. Calculate the angle of emergence and angle of deviation.
(A) \( 90^{\circ}, 60^{\circ} \)
(B) \( 60^{\circ}, 90^{\circ} \)
(C) \( 90^{\circ}, 30^{\circ} \)
(D) \( 30^{\circ}, 90^{\circ} \)
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