This is a sample page from the course "Physics of Light" -- an online
course (or professional development opportunity) for elementary and
middle school teachers. For more information about this course and the
program to which it belongs, see the page
http://www.pa.uky.edu/sciworks/intro.htm"
Color
Our eyes perceive light of different wavelengths as being light of
different color. The two concepts are distinct, however: different
wavelength mixtures may give the same color, and there are colors
(in particular, black and white) which are not represented by light
of a single wavelength. This section will study color, in
order to
make this distinction clearer.