A beam of light enters the end of an optic fiber as shown in Fig. 23–58. a) Show that we can guarantee total internal reflection at the side surface of the material (at point A), if the index of refraction is greater than about 1.42. In other words, regardless of the angle \alpha, the light beam reflects back into the material at point A, assuming air outside. b) What if the fiber were immersed in water?

Show that we can guarantee total internal reflection at the side surface of the material (at point A), if the index of refraction is greater than about 1.42. In other words, regardless of the angle $\alpha$ , the light beam reflects back into the material at point A, assuming air outside.
What if the fiber were immersed in water?

Figure 23-58.

$n_g \geq 1.41$
$n_g \geq 1.88$

Giancoli 7th Edition, Chapter 23, Problem 40 solution video poster

In order to watch this solution you need to have a subscription.

Get Started

View sample solution

Find us on:

Giancoli Answers, including solutions and videos, is copyright © 2009-2024 Shaun Dychko, Vancouver, BC, Canada. Giancoli Answers is not affiliated with the textbook publisher. Book covers, titles, and author names appear for reference purposes only and are the property of their respective owners. Giancoli Answers is your best source for the 7th and 6th edition Giancoli physics solutions.