Light Basics and Geometrical Optics
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This text is meant to accompany class discussions. It is not everything there is to know about uniform circular motion. It is meant as a  prep for class. More detailed notes and examples are given in the class notes, presentations, and demonstrations. See the links below.
 
Ray Tracing
 
Vocabulary


Light reflects off of a body to make the body an "object" and a source of light for all images.

 

If object is underneath the line and pointing downwards, then the upright and inverted image labels would switch.

When you look into a flat mirror on the wall, it appears as if the image is on the other side of the wall. (That is why there are so many kitten and puppy videos of animals reacting to their images in the mirror. https://youtu.be/4dmkRsBm5ww -this is not my video.) This image is a virtual image because light does not pass through the image itself since it looks like it is formed on the other side of the mirror.

 
Concave Mirrors


See each step ray by ray
  • Video
  • Ray by Ray Still Images

The video below describes how to draw the 4 rays for a convcave mirror. The image is found where the REFLECTED rays cross.

These steps are the same for both concave and convex mirrors.

 

 

Convex Mirrors


See each step ray by ray
  • Video
  • Ray by Ray Still Images

The video below describes how to draw the 4 rays for a convex mirror. The image is found where the REFLECTED rays cross.

The steps for draing the 4 rays for convex mirrors are the same steps that are used for convex mirrors.

 

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by Tony Wayne ...(If you are a teacher, please feel free to use these resources in your teaching.)