Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 23 - Light: Geometric Optics - Misconceptual Questions - Page 673: 8

Answer

Choice C.

Work Step by Step

This is explained on page 660. The index of refraction of the fiber’s core is greater than the index of refraction of its surroundings (either air, or a low-n glass). The light inside the fiber core will totally internally reflect off the sides, similar to a bullet ricocheting down a metal pipe.
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