Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Chapter 25.5, Problem 5EYU
In the system shown in Figure 25-36, a vertically polarized incident beam of light encounters two polarizers. If polarizer 1 is removed from the system, does the intensity of the transmitted beam increase, decrease, or stay the same? Explain.
Figure 25-36
Enhance Your Understanding 5.
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Two polarizing filters are arranged as shown. Their transmission axes are measured with respect to the vertical. The source emits unpolarized light with an intensity of 2 W/m.
final
When the angle B is set to 75° the final intensity becomes Ifinal = 0. Calculate (in degrees) the smallest possible angle a of the second polarizer.
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DETAILS
Polarization Experiment
x
0
100
150
200
250
300
350
Theta (degrees)
-cos^2(theta) -Normalized I
By what angle is the observed data out of phase with cos² 0 ?
O 25
O 50
O 75
O 90
Which statement provides the best explanation for this observation?
O The transmission axis of either the polarizer or analyzer (or maybe both) is misaligned to the markings on holder.
O The lab table is not level.
O cos² 0 was calculated in radians rather than degrees.
O There was a draft in the room.
O A polarized light source was used instead of an unpolarized light source.
50
Unpolarized light of intensity 850 W/m² is incident on two ideal
polarizing sheets that are placed with their transmission axes
perpendicular to each other. An additional polarizing sheet is then
placed between the two, with its transmission axis oriented at 30°
to that of the first.
1) What is the intensity of the light passing through the stack of
polarizing sheets? (Express your answer to two significant
figures.)
Submit
W/m²
2) What orientation of the middle sheet enables the three-sheet
combination to transmit the greatest amount of light?
Submit
Chapter 25 Solutions
Physics (5th Edition)
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