COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 23, Problem 95QAP
To determine
(a)
The intensity of polarized light that passes through the stack of polarizing sheets
To determine
(b)
The orientation (angle) of mid sheet so that maximum intensity comes out from the third sheet
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Two polarizing sheets are placed together with their transmission axes crossed so that no light is transmitted. A third sheet is inserted between them with its transmission axis at an angle of 45 degree with respect to each of the other transmission axes. Find the fraction of incident unpolarized light intensity transmitted by the three-sheet combination. (Assume each polarizing sheet is ideal.)
Suppose you have polarized light of intensity 130 W/m2.
What will its intensity be after passing through a polarizing filter with its axis at an 81° angle relative to the light’s polarization direction? Give your answer in terms of mW/m2.
. While wearing your Polaroid sunglasses at the beach, you noticethat they reduce the glare from the water better when you are sitting upright than when you are lying on your side. Explain
Chapter 23 Solutions
COLLEGE PHYSICS
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Can a sound wave in air be polarized? Explain.arrow_forwardWhile you are looking through two polarizing sheets, one of the sheets is rotated 180. Will there be any change in what you observe? Explain.arrow_forwardIf you have completely polarized light of intensity 150 W/m2, what will its intensity be after passing through a polarizing filter with its axis at an 89.0° angle to the light's polarization direction?arrow_forward
- Prove that, if I is the intensity of light transmitted by two polarizing filters with axes at an angle and I is the intensity when the axes are at an angle 90.0, then I+I=I0, the original intensity. (Hint: Use the trigonometric identities cos(90.0)=sin and cos2+sin2=1 .)arrow_forwardTwo polarizing sheets P1 and P2 are placed together with their transmission axes oriented at an angle to each other. What is when only 25% of the maximum transmitted light intensity passes through them?arrow_forwardThree 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°arrow_forward
- Unpolarized light passes through two ideal polarizers in turn with polarization axes at 43.9° to each other. What is the fraction of the incident light intensity that is transmitted?arrow_forwardHow can you determine the polarization axis for a single sheet of Polaroid (especially if you’re at the edge of a lake)?arrow_forwardCertain sunglasses use a polarizing material to reduce the intensity of light reflected from shiny surfaces, such as water or the hood of a car. What orientation of the transmission axis should the material have to be most effective?arrow_forward
- An unpolarized light with an initial intensity of ?0 is incident on two polarizers.What must be the angle between the transmission axes of the two polarizers for the intensity of light to be 3/8 of ?0 after passing through the second polarizer?arrow_forwardA system of three polarizing sheets is placed in the path of initially unpolarized light. The polarizing direction of the first sheet, P1, is parallel to the y-axis, that of the second sheet, P2, is 60o counterclockwise from the y-axis, and that of the third sheet, P3, is parallel to the x-axis. Determine the fraction of the initial intensity Io of the light emerges from the system, i.e. ratio I0/I3. A. 0.092 B. 3.19 C. 10.9 D. 6.66arrow_forwardUnpolarized 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.) a) .125 mW/m2 b) .375 mW/m2 c) none of these.arrow_forward
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