Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 79PCE
A helium-noon laser omits a beam of unpolarizod light that passes through three Polaroid filters, as shown in Figure 25-46. The intensity of the laser beam is l°. (a) What is the intensity of the beam at point A? (b) What is the intensity of the beam at point B? (c) What is intensity of the beam at point C? (d) if filter 2 is removed what is the intensity of the beam at point C?
Figure 25-46
Problem 79, 80, and 98
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Three polarizers are arranged as shown in Figure 25-46. If theincident beam of light is unpolarized and has an intensity of1.60 W>m2, find the transmitted intensity (a) when u2 = 25.0°and u3 = 50.0°, and (b) when u2 = 50.0° and u3 = 25.0°
Unpolarized light of intensity 1 mW/m2 is incident on a plane polarizing filter whose axis makes an angle 300 with the vertical. Then the light passes through a second filter whose axis is horizontal. What is the intensity of the light after it emerges from the second filter? (Hint: When unpolarized light of intensity I0 passes thru a linear polarizer, the transmitted intensity is I0/2. This is because unpolarized light is a mix of random polarization directions (i.e., direction of the E field) and on the average only ½ gets through. See diagram below.)
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Two polarizers are placed one after the other, so that the intensity of the light passing through them is maximum. How much does the intensity of the transmitted light decrease in percent when the latter polarizer is rotated a) 30˚ b) 75˚ ?
Chapter 25 Solutions
Physics (5th Edition)
Ch. 25.1 - Enhance Your Understanding (Answers given at the...Ch. 25.2 - A distant galaxy is moving away from the Earth....Ch. 25.3 - If the frequency of an electromagnetic wave is...Ch. 25.4 - Prob. 4EYUCh. 25.5 - In the system shown in Figure 25-36, a vertically...Ch. 25 - Explain why the invisible man would be unable to...Ch. 25 - While wearing your Polaroid sunglasses at the...Ch. 25 - You want to check the tine while wearing your...Ch. 25 - BIO Polarization and the Ground Spider The ground...Ch. 25 - You are given a sheet of Polaroid material....
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