Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 38 - Photons and Matter Waves - Problems - Page 1185: 89c

Answer

The cutoff wavelength corresponds to the green light.

Work Step by Step

The cutoff wavelength for photoelectric emission from sodium is $545\;nm$. Green light covers the range of wavelengths from $490 - 570\;nm$. Therefore, the cutoff wavelength corresponds to the green light.
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