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Lecture 17 Ray Optics-3 Chapter 23

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Title: Lecture 17 Ray Optics-3 Chapter 23


1
Lecture 17Ray Optics-3 Chapter 23
  • PHYSICS 270
  • Dennis Papadopoulos
  • March 22, 2010

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Total Internal Reflection
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Image by Refraction
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EXAMPLE 23.13 A goldfish in a bowl
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What is a lens?
Device that provides a capability to create
bright and well focused images. How?
Use Refraction to create images out of divergent
light rays
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Converging and Diverging Lenses
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Thin Lenses Real Image Special Rays
Thin lens-gt dltltf,s,s
Inverted Image
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Thin Lenses Ray Tracing
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Tactics Ray tracing for a converging lens
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Tactics Ray tracing for a converging lens
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Lateral Magnification
The image can be either larger or smaller than
the object, depending on the location and focal
length of the lens. The lateral magnification m
is defined as
  1. A positive value of m indicates that the image is
    upright relative to the object. A negative value
    of m indicates that the image is inverted
    relative to the object.
  2. The absolute value of m gives the size ratio of
    the image and object h'/h m .

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sgtf ?h/hs/s
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Virtual Image
slt0 ? mgt0 image upright
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EXAMPLE 23.10 Magnifying a flower
sltf
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Diverging Lenses
Thicker at the edges
Demagnification
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Diverging lenses Ray Tracing
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