Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 28 - Physical Optics: Interference and Diffraction - Conceptual Questions - Page 1003: 8

Answer

Please see the work below.

Work Step by Step

We know that the two films have different refractive indices, hence the interference in the thin films occurs at different wavelengths. We also have a different phase change for the two films. Thus, we see different colors in reflected light.
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