Xref: utzoo sci.electronics:3862 rec.audio:8371
Path: utzoo!attcan!uunet!yale!cmcl2!rna!dan
From: dan@rna.UUCP (Dan Ts'o)
Newsgroups: sci.electronics,rec.audio
Subject: Re: Looking for Blue LEDs
Keywords: blue blue blue, not yellow or red or green
Message-ID: <256@rna.UUCP>
Date: 21 Sep 88 18:22:30 GMT
References: <1138@nmtsun.nmt.edu> <862@ritcv.UUCP> <595@ardent.UUCP>
Reply-To: dan@rna.UUCP (Dan Ts'o)
Organization: Rockefeller University Neurobiology
Lines: 9

In article <595@ardent.UUCP> sleat@ardent.UUCP (Michael Sleator) writes:
>Of course, if you're suggesting a florescent pigment that absorbs red and
>emits blue, that's another matter.  I doubt that's what's going on, though.

	Yes, highly unlikely, since fluors absorb a higher energy photon
and emit a lower energy photon. Blue is higher energy than red, not
vice versa. Maybe its possible to have a fluor absorb two lower energy
photons to emit a single higher energy one (absorb two red, output one
blue), but then what will happen to the extra photoelectron kicking around ?