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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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