Path: utzoo!attcan!uunet!mailrus!ncar!boulder!ccncsu!longs.LANCE.ColoState.EDU!ld231782
From: ld231782@longs.LANCE.ColoState.EDU (Lawrence Detweiler)
Newsgroups: comp.graphics
Subject: standard RGB wavelengths?
Keywords: RGB electromagnetic spectrum color reproduction wavelengths
Message-ID: <7833@ccncsu.ColoState.EDU>
Date: 9 Jul 90 03:31:19 GMT
Sender: news@ccncsu.ColoState.EDU
Reply-To: ld231782@longs.LANCE.ColoState.EDU (Lawrence Detweiler)
Organization: Engineering College, Colorado State University
Lines: 29

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Can someone give me the standard wavelengths of the red, green and blue
television/monitor phosphor emissions (or of the Macintosh color monitor in 
particular)?  As long as we're at it, what is the range of visible colors 
in the electromagnetic spectrum?

Also, since my earlier message got chewed (the mysteriously missing 
leading line) I will ask again:

Is anyone familiar with a formula that, given known RGB wavelengths, can 
give the intensities (amplitudes) of the waves that most nearly approximate 
another wave (or even a superposition of multiple ones)?

The original question was to map the visible range of the electromagnetic
spectrum onto RGB values; but maybe this more specific phrasing above may
ring some bells.  (I'm making the assumption that RGB mappings are actually
superpositioned wave approximations.)  The description has a direct 
mathematical analogue to sine waves--is any stuff in Fourier analysis, etc. 
applicable?

I have been informed that the problem has not been "satisfactorily" answered;
I find this hard to believe.

Please email responses; I will summarize upon request.


ld231782@longs.LANCE.ColoState.EDU