Brewester Angle Apparatus

Brewester Angle Apparatus

Add to wishlist
Compare

Brewster’s Angle Apparatus is designed to study the Brewster’s angle phenomenon and the polarization of reflected light. The essential elements of the apparatus consist of a goniometer, a laser light source capable of projecting a light beam that is linearly polarized in its plane of incidence, and a pinhole photodetector with an output measurement unit for detecting and measuring the intensity of light reflected. The diode laser and polarizer rotator are mounted on an optical rail.

Compare
Ask for Price

Components of the Brewster Angle Apparatus

  • Light Source – Usually a laser (e.g., He-Ne laser) or LED light source.
  • Polarizer – A polarizing filter to control the incident light polarization.
  • Rotating Table – Allows precise adjustment of the angle of incidence.
  • Material Sample – Typically a glass plate, acrylic, or other transparent material.
  • Photodetector or Eyepiece – Used to measure the intensity of the reflected light.

Experimental Procedure

  1. Align the Apparatus – Place the light source so that the beam is incident on the transparent material.
  2. Adjust the Angle of Incidence – Rotate the sample and measure the reflected light intensity at different angles.
  3. Find Brewster’s Angle – Identify the angle where the reflected light is fully polarized (minimum intensity through a crossed polarizer).
  4. Calculate Refractive Index – Use θ_B in the equation to determine n₂.

Applications

  • Anti-Glare Coatings – Used in sunglasses, camera lenses, and optical coatings.
  • Laser Optics – Helps in designing polarizing beam splitters and optical isolators.
  • Material Characterization – Determines refractive indices of unknown materials.
SKU: DSS-00109 Category: Brand:
en English▼
en Englishfr Françaises Españolaf Afrikaanszh-CN 简体中文ar العربيةnl Nederlandstl Filipinode Deutschit Italianoko 한국어pt Portuguêsru Русский