Conceptual Physics (12th Edition)

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

Chapter 29 - Think and Explain: 40

Answer

With slits, the fringe pattern is clearer and brighter.

Work Step by Step

As we can see by contrasting Figures 29.15 and 29.16, with slits, the pattern consists of long, parallel bars of light, rather than the less-regular, more complex fringes caused by overlapping circles of light waves passing through 2 pinholes. Also, using slits allows more light to pass through, making the pattern brighter.
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