Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 26 - Reading Check Questions (Comprehension): 30

Answer

The size of the pupil can be affected by our emotional state. Sensing something pleasing widens the pupil, and sensing something unpleasant contracts the pupil.

Work Step by Step

This is discussed on pages 496-498.
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