Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 24 - The Wave Nature of Light - Misconceptual Questions: 8

Answer

Choice B.

Work Step by Step

Try it and see! The center of the shadow is equidistant from all points on the rim of the disk. Light diffracting around the edges of the disk will constructively interfere at the center of the shadow. This makes a bright point, independent of the light’s wavelength. This bright spot is known as an Arago spot, the Fresnel bright spot, or the Poisson spot.
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