Conceptual Physics (12th Edition)

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

Chapter 28 - Think and Rank: 43

Answer

A=B=C. She sees the same amounts of her face in all three situations.

Work Step by Step

See the diagram. When she is moved twice as far from the mirror, she is also twice as far from her image. The mirror will subtend half the angle that it did before, but this angle will cover the same amount of face as it did previously.
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