University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 33 - The Nature and Propagation of Light - Problems - Discussion Questions - Page 1104: Q33.20


Your feet should face either east or west.

Work Step by Step

As seen in Figure 33.31, scattered skylight is polarized in a north-south direction. Sunglasses have a vertical transmission axis. If your feet face west/east, the transmission axis of your sunglasses will also be along the east-west line. The incoming light will have a polarization axis at right angles to that of your sunglasses, minimizing the transmission of the scattered skylight to your eyes.
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