Classify statements about total internal reflection as true or false. True Answer Bank When light hits a boundary at less than the critical angle, it will undergo total internal reflection. Simple reflection of light off a silvered mirror is more efficient than total internal reflection, so mirrors are often used instead of prisms in optical instruments to minimize light loss. A smaller critical angle means that total internal reflection is more likely to occur. False Fiber optic cables are a practical application of the phenomenon of total internal reflection.