A) \[\sin \,\theta \,>\frac{3}{2}\]
B) \[\sin \,\theta \,>\frac{2}{3}\]
C) \[\sin \,\theta \,>\frac{8}{9}\]
D) \[\frac{2}{3}\sin \,\theta \,>\frac{8}{9}\]
Correct Answer: C
Solution :
Key Idea: There will be total internal reflection at face AC. The critical angle is the angle of incidence I the denser medium for which the angle of refraction in the rarer medium is 90°. From Snells lawYou need to login to perform this action.
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