Chapter 23

Chapter 23 - Chapter23 Light:GeometricOptics Reflection reflection medium light,i.e.representinga

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    Chapter 23 Light: Geometric Optics
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Reflection When a wave reaches a boundary between  two media and is turned back – this is  reflection Total reflection –boundary with a more rigid  medium Partial reflection – less rigid medium. This can be analyzed using the ray model of  light, i.e. representing a light wave with a ray.
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Law of Reflection The law of reflection  states that the angle of  incidence = angle of  reflection Incident ray Reflected  ray Angle of  incidence Angle of  reflection
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Mirrors Plane mirrors are flat mirrors which form a  virtual image. A virtual image is one which forms on the  opposite side of the mirror. Images are the same size as the object and the  same vertical orientation.
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Image in a Plane Mirror Seeing yourself in a plane mirror requires that the mirror be at  least ½ the height of the object You see your head looking straight across You see your feet looking down, since the ray passes through  the mirror at ½ the distance between you and the image so the  mirror, by similar triangles must be ½ your height.
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Plane Mirrors: Things to Remember Images are virtual – i.e behind the mirror Images are the same distance from the  mirror as the object Images are upright Images are the same size as the object. Images are inverted right to left.
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Curved Mirrors Vocabulary Principal Axis – line perpendicular to mirror passing  through the center of curvature and the focal point. Center of Curvature – the geometric center of the 
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This note was uploaded on 11/18/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

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Chapter 23 - Chapter23 Light:GeometricOptics Reflection reflection medium light,i.e.representinga

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