Xref: utzoo sci.electronics:3873 rec.audio:8399 Newsgroups: sci.electronics,rec.audio Path: 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 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