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Chapter 25 - PowerPoint PPT Presentation


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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.