Polarization Conceptual Question

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SUMMARY

The discussion revolves around the concept of polarization in light, specifically in the context of a reflection from a glass surface. The key equations provided include Brewster's angle, defined by the formula tan(Θp) = n2/n1, where n1 is the refractive index of air (1) and n2 is the refractive index of glass (approximately 1.5). The participant expresses uncertainty about determining the polarization direction of the reflected light and the relevance of the equations in solving the problem. Understanding Brewster's angle is crucial for determining the polarization characteristics of light reflected off glass.

PREREQUISITES
  • Understanding of light polarization concepts
  • Familiarity with Brewster's angle and its implications
  • Basic knowledge of refractive indices
  • Ability to apply trigonometric functions in physics
NEXT STEPS
  • Research the derivation and applications of Brewster's angle
  • Learn about the behavior of light at different interfaces, specifically glass and air
  • Explore the concept of partial polarization and its measurement techniques
  • Study the impact of angle of incidence on light reflection and polarization
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Students studying optics, physics educators, and anyone interested in the properties of light and its interaction with materials, particularly in understanding polarization phenomena.

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Homework Statement


You are standing on the sidewalk, looking toward a shop window. You notice the reflection of a person of your height walking toward you. The reflected light is partially polarized. Is it polarized vertically, horizontally, or somewhere in between?

Homework Equations


tan\Theta_{p} = n_{2}/n_{1}
n_{1} = n_{air} = 1
n_{2} = n_{glass} \approx 1.5

The Attempt at a Solution


I don't know how to start thinking about this problem. I know that for a light to be partially polarized means that it is dimmer than it was originally and also that the light in a certain direction has been blocked. I don't know how I would figure out which direction the reflection is polarized though.
 
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While the equations are good, do you need them?

What does Brewster's angle tell you about the polarized light reflected of glass?
 

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