Conceptual Physics (12th Edition)

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

Chapter 28 - Think and Explain - Page 540-542: 60

Answer

In order for you to see a full-length view of your body, you need a mirror at least half your height.

Work Step by Step

See the diagram. The part of the mirror below your midpoint isn’t needed, because light from your feet can still make it to your eyes.
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