Physics: Principles with Applications (7th Edition)

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

Chapter 25 - Optical Instruments - Questions: 3


Light waves bend around the opening the blur the image when the diaphragm opening is very small.

Work Step by Step

As the opening in the iris diaphragm becomes smaller (increasing f-number), diffraction plays a bigger role, i.e., light waves bend around the edges of the opening. This effect tends to blur the image on the sensor/film.
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