chapter 18 mirrors and lenses. objectives 18.1 explain how concave, convex, and plane mirrors form...
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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 workTRANSCRIPT
![Page 1: 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](https://reader036.vdocument.in/reader036/viewer/2022062306/5a4d1b607f8b9ab0599ad10a/html5/thumbnails/1.jpg)
Chapter 18 Mirrors and Lenses
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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 18.1 Explain how concave, convex, and plane mirrors form images 18.1 Locate images using ray diagrams, and calculate](https://reader036.vdocument.in/reader036/viewer/2022062306/5a4d1b607f8b9ab0599ad10a/html5/thumbnails/3.jpg)
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. Objectives 18.1 Explain how concave, convex, and plane mirrors form images 18.1 Locate images using ray diagrams, and calculate](https://reader036.vdocument.in/reader036/viewer/2022062306/5a4d1b607f8b9ab0599ad10a/html5/thumbnails/4.jpg)
Mirrors
• Plane Mirror: Flat, smooth surface where light is reflected by specular reflection and not diffuse
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Flat Plane Mirror
• Image reversed Left-Right
• Image formed equal distance behind mirror
• Image is Virtual– Rays don’t converge
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Real and Virtual
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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
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Concave Mirrors
• Curved in• Focal point is where
parallel rays would converge– Always ½ curvature
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Concave Mirrors/Convex Lens
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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
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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