COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 23, Problem 10QAP
To determine
The physical interactions that take place when unpolarized light is passed through a polarizing filter? Be sure to describe the electric field of the light before and after the filter as well as the incident and transmitted intensities of the light source
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When unpolarised light is passed through a polariser, and then through an analyser with its polarising axis at a right angle to the axis of the polariser, the intensity of the remaining light is approximately zero. When a second polarising sheet is placed between the polariser and the analyser, the final intensity is much brighter and clearly non-zero. Explain how this can happen.
Certain 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?
Physics
Many nocturnal animals demonstrate the phenomenon of eyeshine, in which their eyes glow various colors at night when illuminated by a flashlight or the headlights of a car (see the photo). Their eyes react this way because of a thin layer of reflective tissue called the tapetum lucidum that is located directly behind the retina. This tissue reflects the light back through the retina, which increases the available light that can activate photoreceptors, and thus improve the animal’s vision in low-light conditions. If we assume the tapetum lucidum acts like a concave spherical mirror with a radius of curvature of 0.750 cm, how far in front of the tapetum lucidum would an image form of an object located 30.0 cm away? Neglect the effects of the other structures of the eye, such as the cornea and lens.
Chapter 23 Solutions
COLLEGE PHYSICS
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- While 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_forwardExplain why the “invisible man” would be unable to see.arrow_forwardWhat happens if a Horizontally polarized light beam goes through a quarter wave plate rotated by 45 degrees. What happens to the polarization?arrow_forward
- A teacher does a demonstration using an overhead projector (I = 1810 lm; units are lumens) and three polarizing discs. She places the first disc directly on the overhead machine, a second disc with its axis of polarization completely aligned with the first, and the third with its axis of polarization of 54 degrees counterclockwise to the second. Calculate the intensity of the light that emerges from the third disc.arrow_forwardWhen light reflects off a surface, it becomes polarized, but is it polarized vertically or horizontally? We can answer this question knowing that sunglasses have a vertical transmission axis because they are designed to block this annoying surface- reflected light from entering our eyes. Based on this knowledge, what kind of polarization does reflected light have: vertical or horizontalarrow_forwardMany modern sunglasses are advertised as being polarized. Manufacturers make lenses that are polarized vertically, so as to block off horizontally polarized light coming from reflections from the ground and other flat surfaces, thus reducing glare. If you bought a new pair of polarized sunglasses (and perhaps didn’t care about disassembling it into pieces), how could you verify that the lenses are indeed polarized?arrow_forward
- Describe how you would use two large , circular Polaroid filters in front of a circular window as a kindof window shade.arrow_forwardThe sun shines on a lake and the reflected light is completely polarized. What angle above the horizontal is the sun? (Assume that if the sun were at the horizion, it would be at an angle of 0 degrees)arrow_forwardFive polarizers are stacked, with the polarizing axis of the second, third, fourth and fifth polarizers at angles ofn10,20,30, and 40 degrees relative to that of the first. The first polarizers axis is vertical. I) if unpolarized light of intensith Io is incident on the first polarizer, find the intensity in terms of Io of light emergind from the last 5th polarizer. II) if the second polarizer is removed, but the others are left uncharged,what is the final intensity of the light emerging from the last polarizer in the stack?arrow_forward
- Two polaroid A and B are kept with their transmission axes at an angle Ѳ with respect to one another. If the transmitted intensity of light It = 0.80I0 where I0 is the intensity of light on the system. Then Ѳ is:arrow_forwardExplain the difference between Vertical polarization and Horizontal polarization?arrow_forwardSuppose you want to rotate the plane of polarization of a beam of polarized light by 67°, but you do not want the final intensity to be less than 88% of the initial intensity. What is the minimum number of polarizing sheets you must use? Assume that each sheet is rotated the same angle relative to the adjacent sheets.arrow_forward
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Polarization of Light: circularly polarized, linearly polarized, unpolarized light.; Author: Physics Videos by Eugene Khutoryansky;https://www.youtube.com/watch?v=8YkfEft4p-w;License: Standard YouTube License, CC-BY