Brewster's Angle Accessory - OS-8170A

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Overview

The Brewster's Angle accessory is used when studying the polarization of reflected light and determining Brewster's Angle - the angle of incidence at which light with a particular polarization is transmitted perfectly through a surface with no reflection.

The components of this accessory attach to a PASCO optics bench an allows students to make a graph of intensity versus incident angle in order to experimentally determine Brewster's angle in the laboratory.   

Se the Brewster's Angle Experiment for a complete package of all the equipment  and probeware needed to perform the experiment.

Typical Applications

  • Brewster's Angle
  • Intensity of Reflected Light (Without Polarizer)
  • Intensity of Transmitted Light
  • Snell's Law

Includes

  • Semi-circular acrylic "D" lens
  • Beam Splitter
  • Analyzing Polarizer
  • Lens Mount
  • Pivot Plate Assembly
  • Polarizer Assembly (lens holder and 2 polarizers)
  • How It Works

    When unpolarized light reflects off a nonconducting surface, it is partially polarized parallel to the plane of the reflective surface. There is a specific angle called Brewster's angle at which the light is 100% polarized. This occurs when the reflected ray and the refracted ray are 90 degrees apart.

    Using the Brewster's Angle Accessory, light from a diode laser with a wavelength of 650 nm is reflected off the flat side of an acrylic semi-circular lens.  The reflected light passes through a polarizer and is detected by a Light Sensor.  The angle of incidence is measured by a Rotary Motion Sensor mounted on the Spectrophotometer table.  The intensity of the reflected polarized light versus incident angle is graphed to determine the angle at which light intensity is a minimum.  That angle is Brewster's Angle and can then be used to calculate the index of refraction of the acrylic.

    Buying Guide

    1376
    OS-8537
    Educational Spectrophotometer Accessory Kit
    1
    50477
    OS-8541
    Optics Benches (60 cm)
    2
    57652
    OS-8534A
    Aperture Bracket
    2
    1365
    OS-8525A
    Red Diode Laser - Basic Optics
    1
    Required
    Educational Spectrophotometer Accessory Kit   OS-8537
    Optics Benches (60 cm) (2 required)   OS-8541
    Aperture Bracket (2 required)   OS-8534A
    Red Diode Laser - Basic Optics   OS-8525A
    57194
    PS-2176
    PASPORT High Sensitivity Light Sensor
    2
    1264350
    PS-2120A
    PASPORT Rotary Motion Sensor
    1
    Required for use with PASPORT
    PASPORT High Sensitivity Light Sensor (2 required)   PS-2176
    PASPORT Rotary Motion Sensor   PS-2120A
    1353
    CI-6604
    High-Sensitivity Light Sensor
    2
    1385
    CI-6538
    Rotary Motion Sensor
    1
    Required for use with ScienceWorkshop
    High-Sensitivity Light Sensor (2 required)   CI-6604
    Rotary Motion Sensor   CI-6538