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PURPOSE
OF UNIT
There are three specific goals for IN A DIFFERENT LIGHT. The first goal
is to develop the understanding that visible light is composed of a full
range (spectrum) of colors of light from red to violet. This is an essential
understanding that should be developed before studying of the entire
electromagnetic spectrum ranging from radio to gamma rays. In the process
you need to confront the preconceptions that many students have (see
Background for MIX IT UP and GETTING HOTTER?).
The second goal is to extend the concept of a spectrum to include
non-visible light (infrared and ultraviolet) through discovery. Lessons
4 and 5 guide the student to a discovery of infrared and ultraviolet
light, respectively. A reading that shows them how scientists use
infrared light and ultraviolet light to study phenomena not accessible
to visual inspection follows each discovery.
The third goal is to develop tools and strategies for student inquiry.
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