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Chapter 25

Chapter 25. Reflection and Refraction. Reflection and Refraction. Reflection. Reflection. We will focus on specular reflection. The Law of Reflection. All angles are measured with respect to the normal . normal. Multiple reflections. Snell’s Law of Refraction. Refractive Index.

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Chapter 25

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  1. Chapter 25 Reflection and Refraction

  2. Reflection and Refraction

  3. Reflection

  4. Reflection We will focus on specular reflection

  5. The Law of Reflection All angles are measured with respect to the normal. normal

  6. Multiple reflections

  7. Snell’s Law of Refraction

  8. Refractive Index

  9. Useful facts

  10. Reflection and refraction

  11. Be careful with the normal

  12. More on refractive index

  13. Wavelength in different medium

  14. Find the refractive index and the speed of light in the liquid

  15. Solution

  16. Different colors different speed

  17. Dispersion

  18. What happened to my ruler?

  19. Explanation

  20. How to catch a fish

  21. How to catch a fish

  22. The image

  23. How to catch a bug

  24. Find θair for the following cases: nwater = 1.33

  25. Solution Total internal reflection

  26. Total Internal Reflection

  27. A slightly more accurate picture

  28. Total internal reflection (TIR) Total internal reflection occurs when θincident > θc

  29. The critical angle, θc θc is the angle of incident θincident when θrefraction = 90o

  30. Find the critical angle for diamond in air

  31. Shiny diamonds and total internal reflection

  32. Cubic Zirconium Refractive index: 2.15 to 2.18 (diamond: 2.42) Hardness: 8.5 to 9 (diamond: 10) Ingredients: zirconium oxide, magnesium, calcium (diamond: carbon)

  33. Applications of TIR Fiberoptics

  34. Total internal reflection

  35. Huygen’s Principle Every point of a wave front may be considered the source of secondary wavelets that spread out in all directions with a speed equal to the speed of wave. The final wave is the sum of all these secondary wavelets.

  36. Deriving Snell’s Law of Refraction

  37. Principle of Least Time Light always travels between two points in the path that takes the least amount of time.

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