Everybody Loves Ray Diagrams II

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Everybody Loves Ray Diagrams (II)
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Ray Diagrams for Convex Mirrors!

• The concept isvery similar toconcave mirrors.
• You still have a(C), (f), and anobject, though
  the center of curvature (C) and the focal point
  (f) are located on the side of the mirror
  opposite the object behind the mirror.

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Reflect on This!

• After reflection, the reflected rays diverge
  they will never intersect on the object side of
  the mirror.
• For this reason, like plane mirrors, convex
  mirrors produce only virtual images which are
  located somewhere behind the mirror.

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The New Rules

• Any incident ray traveling parallel to the
  principal axis on the way to a convex mirror will
  reflect so that its extension will pass through
  the focal point.
• Any incident ray traveling towards a convex
  mirror so that its extension passes through the
  focal point will reflect and travel parallel to
  the principal axis.

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The Full Picture!
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Extension? HUH?

• Okay, rememberwere talking about VIRTUAL images
  now, so were going to draw lines AS IF the
  rays went behind the mirror.

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Convex Ray Diagrams

• Pick a point on the top of the object and draw
  two incident rays traveling towards the mirror.
• Draw one ray so it travels towards the focal
  point on the opposite side of the mirror stop
  the ray at the point of incidence with the
  mirror.
• Draw the second ray so it travels exactly
  parallel to the principal axis.

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The Idea is the Same!

• The ray that travels towards the focal point will
  reflect and travel parallel to the principal
  axis.
• The ray which traveled parallel to the principal
  axis on the way to the mirror will reflect and
  travel in a direction such that its extension
  passes through the focal point.

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Eyes on the Prize!

• Locate the Image as before!