Talk:Optical spectrum
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optical spectrum from radio to x-rays? where did you get that from? please, references.
- I find it strange too, but it's lifted verbatim from the Federal Standard 1037C. I'm in doubt about removing the paragraph or not. At18 19:18, 16 Aug 2003 (UTC)
- At18 21:19, 16 Aug 2003 (UTC) Following be bold in updating pages policy, I removed this paragraph (radio? X-rays????):
- The term "optical spectrum" originally applied only to that region of the electromagnetic spectrum which is visible to the normal human eye, but is now considered to include all wavelengths between the shortest wavelengths of X-rays and the longest of radio. At this writing, no formal spectral limits are recognized nationally or internationally.
--[[User:Dkroll2|]] 19:07, Dec 14, 2004 (UTC) Optical means optics, which means visible. Wwll actualy I DID fin the reference to optical spectrum from radio t x-rays. now I lost it, but he was right --[[User:Dkroll2|]] 05:49, Dec 19, 2004 (UTC)
- check out this definition exteral
--[[User:Dkroll2|]] 06:32, Dec 19, 2004 (UTC)
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Image of the vivible spectrum
Why isn't there a picture of the visible spectrum here? Malbi 13:35, 2 Dec 2003 (UTC) There is now --[[User:Dkroll2|]] 19:07, Dec 14, 2004 (UTC)
Still agrument further down ar to how it should appear. It is burned in my brain. Theonly thing I could do is to add absorption line (too much info for this page) pr make the cy light/brighter, but NOT wider. It isn't any wider.--[[User:Dkroll2|]] 07:47, Dec 19, 2004 (UTC)
Some more info...
This text below is what I used already in a presentation of mine (the electromagnetic spectrum (http://www.e-builds.com/EM%20spectrum/)). I wanted to include more and happened to land here. Besides "taking", I'd figure I'd "give" something too. Don't know whether this is usefull or not for inclusion, but here it is:
Visible spectrum is only a very small band of the EM spectrum, though it is emitted and reflected by almost everything and it is also least absorbed by the atmopshere. Probably this is why evolution decided to make the four cells in the retina of the human eye sensitive to it. One type of cell 'feels' the intensity of light, the other 3 covers Redish, Greenish and Blue-ish intensities (each with it's sensitivity curves). Hence we can see all colours by a combination of those 3. --[[User:Dkroll2|]] 19:07, Dec 14, 2004 (UTC) I wrote the same thing in simler language NO, not really.
use: fibre optics, Astronomy use: RGB (red green blue) in TV / computers to "fool" our eyes to see all visible colors by adding different saturations of these colors use: CYV (Cyan Yellow Violet?) in printers / copiers /painters to do the same thing but by substracting values
Cheers, e-builds (http://www.e-builds.com)
Can't recall for certain where I picked this up... Could have been in a Physics lecture. I'm given to understand that the various colors detected by the eye are not of fixed width -- that is, the wavelengths perceived as green may be a wider band than those perceived as blue. Each person may have a slightly different 'eye' for colors also.
See: Trichromat, Tetrachromat.
karlheg 01:35, 2004 Oct 29 (UTC)
Include vs. exclude cyan
hacker got me 66.245.87.206 21:11, 15 Dec 2004 (UTC)
No, my intention is never to neglect cyan
I stare at spectrums all day. And how ,say the sky, appears at first glance is RED GREEN BLUE, then you will next notice the narrow region of yellow, then next too it a small amout of orange, then you might notice a very thin region of cyan, then you see the violet. I've watched hundered of student go thourough this same exercise will all continuous sources. Personally as I review my diagram, I may have too much cyan as compared to what is witnessed from the sun. HOWEVER I might attempt to make it lighter, as both yellow and cyan shoud be the lightest hues since they excite 2 sets of cones.
What should I do?--[[User:Dkroll2|]] 05:58, Dec 19, 2004 (UTC) Is this what more scientists are used to sho have never actually view the light of the sun througha simple prism?
I'm deleting my stuff on this page. A hacker screwed me over.
--[[User:Dkroll2|]] 13:22, Dec 24, 2004 (UTC)
Source for Newton date 1671
Oxford English Dictionary: spectrum 2nd Ed. 1989 Caltrop 13:08, Mar 5, 2005 (UTC)
what is this "compound phenomenon" stuff?
What is this section on "compound phenomenon"? In particular, who is this Goethe that keeps getting mentioned, why are his views on the color spectrum notable, and how do they relate to other views? Is this the 18th/19th century Johann Wolfgang von Goethe we're talking about? --Delirium 04:19, May 31, 2005 (UTC)