College Physics (4th Edition)

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

Chapter 22 - Multiple-Choice Questions - Page 862: 8


The correct answer is: (d) As many as possible

Work Step by Step

To change the polarization $90^{\circ}$ with $N$ sheets, we can rotate each sheet at an angle of $\frac{90^{\circ}}{N}$ to the previous sheet. According to Malus' law, the transmitted intensity through a polarizing sheet is given by $I = I_0~cos^2~\theta$, where $I_0$ is the intensity of the incident light. With $N$ sheets, the final transmitted intensity is $I = I_0~(cos~\frac{\theta}{N})^{2N}$, where $I_0$ is the initial intensity. As $N$ increases, the value of this expression increases. Therefore, we should use as many sheets as possible to get maximum transmitted intensity. The correct answer is: (d) As many as possible
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.