College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 27 - Section 27.3 - The Photoelectric Effect - Checkpoint - Page 1022: 27.3

Answer

The energy of a photon is proportional to its frequency.

Work Step by Step

At threshold frequency, a photon has just enough energy to liberate an electron from the metal. Below the threshold frequency; a photon has insufficient energy to liberate an electron.
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