Re: Looking for Blue LEDs

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Article #19755

#19755

From: Henry Spencer
Date: Sat, 24 Sep 1988 05:11

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In article <262@rna.UUCP> dan@rna.UUCP (Dan Ts'o) writes:
>... But if you add
>red light to green light, you get yellow light, not brown paint.

Dept of Nitpicking:  actually you don't get yellow light, you get light
that *looks* yellow to an unaided human eye.  A spectrophotometer (or
just a prism) will reveal that it really still is red plus green.  (I
have seen people confused over this, so it seemed worth mentioning.)
-- 
NASA is into artificial        |     Henry Spencer at U of Toronto Zoology
stupidity.  - Jerry Pournelle  | uunet!attcan!utzoo!henry henry@zoo.toronto.edu

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Message-ID: <1988Sep24.051114.15993@utzoo.uucp>

Path: arc1-ca.pugleaf.net!utzoo!henry

References: <1138@nmtsun.nmt.edu> <862@ritcv.UUCP> <255@rna.UUCP> <4422@lynx.UUCP> <871@ritcv.UUCP> <262@rna.UUCP>

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Newsgroups: sci.electronics,rec.audio
Path: arc1-ca.pugleaf.net!utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: Looking for Blue LEDs
Message-ID: <1988Sep24.051114.15993@utzoo.uucp>
Organization: U of Toronto Zoology
References: <1138@nmtsun.nmt.edu> <862@ritcv.UUCP> <255@rna.UUCP> <4422@lynx.UUCP> <871@ritcv.UUCP> <262@rna.UUCP>
Date: Sat, 24 Sep 88 05:11:14 GMT

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