College Physics (4th Edition)

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

Chapter 27 - Multiple-Choice Questions - Page 1041: 9


The correct answer is: (e) none of the above

Work Step by Step

We can write an equation for the maximum kinetic energy of an electron in the experiment: $K_{max} = \frac{hc}{\lambda}-\phi$ As the intensity of the light increases, the number of photons increases, which results in a greater number of electrons being ejected from the metal. However, the work function $\phi$ does not change since $\phi$ is a characteristic of the material. Since $\phi$ does not change and $\lambda$ does not change, $K_{max}$ does not change. Since the stopping potential is proportional to $K_{max}$, the stopping potential does not change. The correct answer is: (e) none of the above
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