Xref: utzoo sci.electronics:3871 rec.audio:8397
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From: jnh@ece-csc.UUCP (Joseph Nathan Hall)
Newsgroups: sci.electronics,rec.audio
Subject: Re: Looking for Blue LEDs
Keywords: blue blue blue, not yellow or red or green
Message-ID: <3781@ece-csc.UUCP>
Date: 23 Sep 88 12:02:02 GMT
References: <1138@nmtsun.nmt.edu> <862@ritcv.UUCP> <255@rna.UUCP> <4422@lynx.UUCP> <871@ritcv.UUCP>
Reply-To: jnh@ece-csc.UUCP (Joseph Nathan Hall)
Organization: North Carolina State University, Raleigh, NC
Lines: 23

In article <871@ritcv.UUCP> cep4478@ritcv.UUCP (Christopher E. Piggott) writes:
>Question: why are R.G.B. monitors Red, GREEN, blue, when GREEN is not one of
>the primary colors (being a combination of blue and yellow)?  Why shouldn't
>it be red, YELLOW, blue?

Well, because then you can't get green.
>
>Projection televisions work the same way ... is it possible to emit green,
>and blue 180 degrees out of phase with the blue component of the green, to
>cancel out the blue and the green and make yellow?  

No.

If not, how do you make
>yellow?
>
Red + green.  Red + blue = magenta, green + blue = cyan (light blue.)
(Really!)  Sheesh.
-- 
v   v sssss|| joseph hall                      || 201-1D Hampton Lee Court
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  v   sss  || the opinions expressed herein are not necessarily those of my
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