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Help please-light spectrum graphic is missing



Hello everyone

Last fall I located a graphic of the light spectra. It was
superspecial.
The first one I have ever seen in which the colors'
wavelengths change as
the "prism's"spread from violet to red.

I am working on an document about IR and want to "use" (with
permission of
course) graphic as part of the explaination.

I can not find the image. I am afraid it was from Ency.
Brit when they had
the beta version running.

If you know where I can find this graphic please share that
information
with me.

With crossed fingers-----thanks in advance.
sheron

Sheron Snyder, Outreach Coordinator
Physics and Astronomy, Abrams & NSCL
Abrams Planetarium, MSU
East Lansing, MI 48824
SnyderS@dirac.pa.msu.edu