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Chapter 18 Mirrors and Lenses

Chapter 18 Mirrors and Lenses. Objectives. 18.1 Explain how concave, convex, and plane mirrors form images 18.1 Locate images using ray diagrams, and calculate image location and size using equations 18.1 Explain the cause of spherical aberration and how the effect may be overcome

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Chapter 18 Mirrors and Lenses

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  1. Chapter 18 Mirrors and Lenses

  2. Objectives • 18.1Explain how concave, convex, and plane mirrors form images • 18.1 Locate images using ray diagrams, and calculate image location and size using equations • 18.1 Explain the cause of spherical aberration and how the effect may be overcome • 18.1 Describe uses of parabolic mirrors

  3. Objectives • 18.2Describe how real and virtual images are formed by convex and concave lenses • 18.2 Locate the image with a ray diagram and find the image location and size using a mathematical model • 18.2 Define chromatic aberration and explain how it can be reduced • 18.2 Explain how optical instruments such as microscopes and telescopes work

  4. Mirrors • Plane Mirror: Flat, smooth surface where light is reflected by specular reflection and not diffuse

  5. Flat Plane Mirror • Image reversed Left-Right • Image formed equal distance behind mirror • Image is Virtual • Rays don’t converge

  6. Real and Virtual

  7. Real verse Virtual • Since real images do converge, they can be projected onto a screen. • Virtual images can not be projected, because rays don’t converge

  8. Concave Mirrors • Curved in • Focal point is where parallel rays would converge • Always ½ curvature

  9. Concave Mirrors/Convex Lens

  10. Image Formed at Intersection

  11. Convex Lens Formation

  12. Convex Lens Formation

  13. Convex Lens Formation

  14. Convex Lens Formation

  15. More on Eye

  16. Spherical Aberration • When the mirror/lens has defects which cause parallel rays NOT to converge at the focal point • Mirrors tend to be easier to make more precise then lens due to size limitations of lens

  17. Chromatic Aberration • Due to light waves refracting differently, get blurred image at edges of lens • To fight this, use two lenses, one of each, to cancel effects

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