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Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
Snell's law
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Snell's law

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  • 1. Total Internal Reflection
  • 2. Total Internal Reflection
    • Occurs when light reflects off of the inside wall of a denser medium (higher index of refraction )
  • 3.
    • Recall:
    • When light passes from a dense material into a less dense medium, light reflects away from the normal
    Total Internal Reflection
  • 4.
    • As the angle of incidence increases , the angle of refraction increases
    Total Internal Reflection
  • 5. Critical Angle
    • At a certain angle, the refracted ray follows a path exactly along the surface of the dense medium
    • This angle is called the “ critical angle ”
  • 6. Critical Angle
    • If the incident ray is increased beyond the critical angle, the light is no longer refracted
    • Instead, it is reflected back inside the medium
    • This is called “ total internal reflection ”
  • 7.  
  • 8.  
  • 9.  
  • 10. Mirages
    • Formed by both Total Internal Reflection and Refraction
    • Produced when light passes through layers of air with different densities
  • 11. Mirage
  • 12. Snell’s Law
  • 13. Willebrord Snell
    • Dutch astronomer & mathematician
    • Identified the exact relationship between the angle of incidence and angle of reflection
  • 14. Snell’s Law
    • n 1 = index of refraction for medium 1
    • n 2 = index of refraction for medium 2
    •  1 = angle of incidence
    •  2 = angle of refraction
  • 15.  
  • 16.  

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