Conceptual Physics (12th Edition)

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

Chapter 26 - Think and Explain: 70

Answer

The size of the pupil can be affected by our emotional state. Sensing something pleasing widens the pupil, and sending something unpleasant contracts the pupil. So, if your sweetie says "I love you" with constricted pupils...

Work Step by Step

This is discussed on pages 496-498. NB: this answer should not be taken as relationship advice. There may be other reasons for the constricted pupils.
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