Conceptual Physics (12th Edition)

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

Chapter 27 - Think and Discuss - Page 518: 76


White light. No light.

Work Step by Step

Only blue light is transmitted through the blue filter. Only yellow light is transmitted through the yellow filter. The overlapping beams produce white light because they are complementary colors: yellow + blue = white (page 509). When blue and yellow panes of glass are both placed in front of 1 flashlight, little or no light will be transmitted. White - yellow - blue = zero light.
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