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CHAPTER-17 Light and Image Formation

CHAPTER-17 Light and Image Formation. Chapter Outline. 1 Reflection and Image Formation 2 Refraction of Light 3 Lenses and Image Formation 4 Focusing Light with Curved mirrors 5 Eyeglasses, Microscopes, and Telescopes Everyday Phenomenon: Rainbows and Laser Refractive Surgery.

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CHAPTER-17 Light and Image Formation

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  1. CHAPTER-17Light and Image Formation

  2. Chapter Outline 1 Reflection and Image Formation 2 Refraction of Light 3 Lenses and Image Formation 4 Focusing Light with Curved mirrors 5 Eyeglasses, Microscopes, and Telescopes Everyday Phenomenon: Rainbows and Laser Refractive Surgery

  3. How Does an Image Formed in a Mirror?

  4. How Are Light Rays Related to wavefronts? Wavefronts are perpendicular to the rays.

  5. Reflection

  6. The Law of Reflection The angle of incidence = The angle of reflection.

  7. How Are Images Formed by a Plane Mirror?

  8. How Are Images Formed by a Plane Mirror?

  9. Q7

  10. Refraction of Light

  11. Definition Of The Index Of Refraction The index of refractionn of a material is the ratio of the speed c of light in a vacuum to the speed v of light in the material:

  12. Law of Refraction

  13. Apparent Depth of Fish Is Smaller Than Actual Depth Due to Refraction

  14. Total Internal Reflection

  15. Why a Diamond Sparkles? Why does a diamond exhibit such brilliance? And why does a diamond lose much of its brilliance when placed under water?

  16. Optical Instruments Many optical instruments, such as binoculars, periscopes, and telescopes, use glass prisms and total internal reflection to turn a beam of light through 90° or 180°.

  17. Prism and Spectrum of Colors

  18. Dispersion of Light

  19. Rainbow

  20. Primary Rainbow Water droplet disperses the light into colors.

  21. Secondary Rainbow Colors are reversed and less intense.

  22. Focal Point (F) and Focal Length (F)

  23. Ray Diagram

  24. Ray Diagram

  25. Diverging or Negative lens:Focal Point (F) and Focal Length (f)

  26. Ray Diagram for Diverging Lens

  27. Lens Equation

  28. Lens Equation and Magnification, m

  29. E6

  30. Optical Instruments • Human eye • Camera • Eyeglasses • Microscope • Telescope

  31. Vision Defects • Nearsightedness: can see only nearby objects clearly. • Farsightedness: can see only far objects clearly.

  32. Nearsighted Eye, Myopia

  33. Negative Lens Is Used to Correct Nearsightedness

  34. Positive Lens Is Used to Correct Farsightedness

  35. How Does a Microscope Work? • Used to view small things nearby. • Consists of two positive lenses, objective and eyepiece. • Final image is magnified and inverted. • Ray diagram can be used to illustrate the image formation.

  36. Ray Diagram For Microscope

  37. Microscope A laboratory microscope has 3 or 4 objective lenses.

  38. Astronomical Telescope

  39. LASIK

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