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Lab 9: Reflection and Refraction

Lab 9: Reflection and Refraction. Law of Reflection Law of Refraction (Snell’s Law) Index of Refraction The Critical Angle Total Internal Reflection Dispersion Light Passing through a Window Pane or Prism How Large does a Mirror Need to be? Location of Mirror Image Rainbows

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Lab 9: Reflection and Refraction

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  1. Lab 9: Reflection and Refraction • Law of Reflection • Law of Refraction (Snell’s Law) • Index of Refraction • The Critical Angle • Total Internal Reflection • Dispersion • Light Passing through a Window Pane or Prism • How Large does a Mirror Need to be? • Location of Mirror Image • Rainbows • Corner Reflectors • Fiber Optics • Polarization by Reflection

  2. Light ray • Originates at a point source • Travels straight • Changes direction at interface • Reflection & refraction in this lab • Object • Point source of light rays • Image • Apparent convergence point of light rays from object

  3. Draw diagrams involving • Light rays • Interface • Angles • Estimate angles to the tenth of a degree • Take several measurements and then average them

  4. Light Rays • indicated as arrows • from object  extend outward

  5. white light Light Rays light unit: a ray of light made by a slit

  6. air medium Interface normal : direction perpendicular to interface interface : boundary between different media Cross-sectional View

  7. qi qr air mirror air Reflection (Specular) angles measured from normal angle of incidence (qi ) angle of reflection (qr ) Cross-sectional View

  8. Top view ray of light Experiment #1 qM ray of light qA Component Line qA qM Experiment #2 Aim light ray at the center of semicircle.

  9. Reflection Refraction #1 Use the “degree” mode on your calculator

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