Physics Traditional: Unit 13 "Lenses & Refraction"

13 - Lenses & Refraction
Summary: In the last unit you learned that people’s brains process images in the belief that light travels in straight lines. Last time this was useful to understand curved mirrors. In this unit, we use this principal with Ray Tracing to understand images formed by lenses. Lenses refract (bend) light because light travels in waves and light slows down in optically dense media such as glass and water. In this unit we learn that the speed of light is NOT a constant and use that to model why light bends. We’ll use our new model of light bending to see how concave and convex lenses bend light to create images and use Ray Tracing to understand the images they make. We’ll use the math of Snell’s law to calculate how much light bends and learn about total internal reflection, which is why fiber optics works. We’ll use previous knowledge and our new understanding of refraction and total internal reflection to understand prisms, rainbows, mirages, vision correction and fiber optics. In the candle lab, you’ll be amazed to see a real image form and after the quest, we’ll do a project.

Resources: Chapters 14, work packet, notes, website, handouts.

Calendar

Unit 13: Lenses & Refraction

Vocabulary & Equations

Objectives, vocabulary & equations

Other important files (resources)

  1. Work packet
  2. Final Exam - 2013 Ms. Breig's Review Guide
  3. Final Exam - 2013 Mr. Liaw's Review Guide
  4. Final Exam - 2013 Equation Sheet Used During Exam

Tutorials (right-click and save file locally ("save target as"), then play)

  1. Notes - 13-01: Lenses & Refraction, Why light bends & Snell's law
  2. Notes - 13-03: Refraction: Lens Ray Tracing & how wavelength & f interact
  3. Notes - 13-04: Critical Angle & Total Internal Reflection
  4. Notes - 13-06: Lens Equation, Magnification Equation
  5. Notes - 13-09: Refraction: Spearing fish, prisms, rainbows, mirages

More Links

  1. Notes - 13-01: Lenses & Refraction, Why light bends & Snell's law
  2. Notes - 13-03: Refraction: Lens Ray Tracing & how wavelength & f interact
  3. Notes - 13-04: Critical Angle & Total Internal Reflection
  4. Notes - 13-06: Lens Equation, Magnification Equation
  5. Notes - 13-09: Refraction: Spearing fish, prisms, rainbows, mirages
  6. Why refraction happens (BIG picture file)
  7. Really good sim for understanding rainbow (needs shockwave)
  8. How a rainbow works - includes explanation of reflection & dispersion
  9. Best lens & mirror simulator I know
  10. Good sim example of principal rays for lenses
  11. Lens ray tracing practice problems
  12. Explanation of lens type used for vision correction
  13. A few index of refraction practice problems
  14. Light phenomenon notes
  15. Look at sim and answer: Do all wavelengths of light bend by the same amount?
  16. Sim explains why "aim low because we see fish high"
  17. Lens & vision refraction powerpoint
  18. Refraction notes
  19. Explanation for near and far sighted (Hewitt)
  20. Red devil student explanation of rainbows
  21. Picture of why it's hard to see close-up things (especially as you get over 40...show mom and dad!)
  22. Critical angle simulation 1
  23. Critical angle simulation 2
  24. Critical angle simulation 3
  25. In class explanation of rainbows, mirages, etc.