[TheForge] Spectroscope

Wed Apr 23 22:32:01 2003

----- Original Message -----
From: "Bruce Freeman" <[email protected]>
To: <[email protected]>
Sent: Tuesday, January 21, 2003 3:51 PM
Subject: [TheForge] Spectroscope

While lecturing y'all about the lack of UV emmissions from a forge fire, I
was thinking how nice it would be if everybody had a spectroscope so they
could see these things for themselves (not the UV, of course, but the lack
of intensity in the purple-end of the spectrum from a forge fire).

Well, it occurred to me that a compact disk is a pretty good reflection-type
diffraction grating, as anyone can tell from the rainbow colors they
produce.  So I did a google search, and lo and behold, someone thought of it
already!  The following gives detailed instructions how to build your own
spectroscope from a CD and misc. other trash:

http://www.scitoys.com/scitoys/scitoys/light/cd_spectroscope/spectroscope.ht
ml

Enjoy.

Bruce
NJ

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