Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 34 - Images - Problems: 19a

Answer

Convex.

Work Step by Step

According to 19c, the radius of curvature is negative. Since $$r=2f$$ if the radius of curvature is negative, the focal length must also be negative. The only type of mirror that has a negative focal length is a convex mirror, so the mirror must be convex.
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