Read the online background information at the sites below, and answer the questions 1-4. You will be held responsible for the information included in the questions.

These sites contain references to an "optics kit". You can ignore those sections for now. You will work with your optics kits later.

http://acept.la.asu.edu/PiN/mod/light/colorspectrum/pattLight3Obj1.html

http://acept.la.asu.edu/PiN/mod/light/colorspectrum/pattLight3Obj2.html

http://acept.la.asu.edu/PiN/mod/light/colorspectrum/pattLight3Obj3.html

The links above are also at

http://acept.la.asu.edu/PiN/mod/light/colorspectrum/pattLight3.html

1. Use the terms absorbing and reflecting to explain why an illuminated object appears to have a particular color.

2. What definition is given for "primary colors" in the lesson?

3. When you saw the demo of the subtractive color filters, the result was no light penetrating and a black area was formed on the screen. Yet, in the online lesson, it states that cyan, magenta and yellow can be considered primary colors. How can this be explained?


4. Explain the terms "additive" and "subtractive" processes as they apply to light, and give examples.


5. List seven forms of electromagnetic energy other than light, and give the frequency ranges for each (you may need your textbook for part of this).

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