Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 34 - Ray Optics - Exercises and Problems - Page 991: 43


$d = 6.43~cm$

Work Step by Step

We can write an expression for the speed of light in the silicon fiber: $v = \frac{c}{n}$ The total travel time in the silicon is $1.50~ns$ We can find the maximum distance: $2d = v~t$ $d = \frac{c~t}{2n}$ $d = \frac{(3.0\times 10^8~m/s)(1.50\times 10^{-9}~s)}{(2)(3.50)}$ $d = 0.0643~m$ $d = 6.43~cm$
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