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Chapter 18 Mirrors and Lenses

Chapter 18 Mirrors and Lenses

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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 - PowerPoint PPT Presentation

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Page 1: Chapter 18 Mirrors and Lenses

Chapter 18 Mirrors and Lenses

Page 2: 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

• 18.1 Describe uses of parabolic mirrors

Page 3: Chapter 18 Mirrors and Lenses

Objectives

• 18.2 Describe 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

Page 4: Chapter 18 Mirrors and Lenses

Mirrors

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

Page 5: Chapter 18 Mirrors and Lenses

Flat Plane Mirror

• Image reversed Left-Right

• Image formed equal distance behind mirror

• Image is Virtual– Rays don’t converge

Page 6: Chapter 18 Mirrors and Lenses

Real and Virtual

Page 7: Chapter 18 Mirrors and Lenses

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

Page 8: Chapter 18 Mirrors and Lenses

Concave Mirrors

• Curved in• Focal point is where

parallel rays would converge– Always ½ curvature

Page 9: Chapter 18 Mirrors and Lenses
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Concave Mirrors/Convex Lens

Page 11: Chapter 18 Mirrors and Lenses

Image Formed at Intersection

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Convex Lens Formation

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Convex Lens Formation

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Convex Lens Formation

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Convex Lens Formation

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More on Eye

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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

Page 24: Chapter 18 Mirrors and Lenses

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