Template talk:Electromagnetic spectrum

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Category Electromagnetic spectrum[edit]

I added a category so the articles are automatically mutually accessible. After the article's next edit which reloads the template, that is. (SEWilco 06:26, 27 May 2005 (UTC))

Indigo? Where is Cyan?[edit]

In the EMS article describes the visible spectrum as consisting of violet, blue, cyan, green, yellow, orange and red. Where did indigo come from? And where is cyan? Matveims 00:01, 20 December 2005 (UTC)

Has there been enough talk about the inclusion of indigo for there to be a poll on whether indigo should actually be included?? Here is my answer:

Indigo is known almost exclusively for its inclusion in ROYGBIV, which is because Newton wanted 7 colors instead of just 6. I don't think it is really talked about practically in anyway independent of its inclusion in ROYGBIV. I say remove it. Any objections?? Georgia guy 00:04, 20 December 2005 (UTC)

Violet Indigo Blue Green Yellow Orange Red
Violet Blue Cyan Green Yellow Orange Red
Which one looks like a more accurate representation of the color spectrum to you? In my oppinion, the bottom one (with cyan). Let's hope we can get someone other then us two involved in this discussion too. Matveims 03:15, 20 December 2005 (UTC)

So, shall we include cyan in the spectrum? User:Matveims 01:46, 12 January 2006 (UTC)

I didn't know this debate was going on, so let's perhaps take a step back? The division of the optical spectrum is arbitrary. We have to use something, and Newton's seven colours are as good a division as any (if we were to select colours based on the examples above then we might eliminate blue!). The "seven colours of the rainbow" have been known to generations of school kids and are widely accepted throughout education and elsewhere. Wikipedia should not try to modify current thinking - it should report it. I suggest we re-instate the ROYGBIV listing until a fuller debate has taken place. Alternatively we could set up an article for the "traditional spectrum", but that doesn't get over the problem of the template. Arcturus 23:26, 24 January 2006 (UTC)

That was the first response in 12 days. Do you think Matveims will be aware of that?? Please put that on User talk:Matveims. Georgia guy 23:28, 24 January 2006 (UTC)
If Matveims is interested in the debate he should be watching this page. I'll put a comment on his talk page to direct him here. Arcturus 23:31, 24 January 2006 (UTC)
I'm surprised that ROYGBIV is the standard, actually. In most of east europe (where I grew up), the standard is ROYGCBV (the cyan version). There's even a chant: "Каждый Охотник Желает Знать Где Сидит Фазан". Perhaps wikipedia just has non-standard definitions for colors "blue" and "violet," so it desn't resemble therainbow as closely. OF course, if ROYGBIV is the standard, I'd go along. But then, why not to correct the Electromagnetic spectrum article? Sorry id I'm making too big of a deal about this. I would like to get the colors right.Matveims 01:36, 25 January 2006 (UTC)

Bullet-red.png Excuse me, but cyan is not a monochromatic color (it's a mix of green and blue), so it shouldn't be listed in a list of EM spectrum, in my opinion! Only monochromatic colors (meaning existing of only 1 specific frequency in the spectrum) should be listed here. R U Bn (Talkcontrib) 12:42, 18 March 2007 (UTC)

You know, the rods (and/or cones) in our eyes are only sensitive to the electromagnetic-wave frequencies of what we call red, green, and blue. All other colors are merely varying combinations of these three. That's why color monitors can emulate pretty much any color that we can see while having only red, green, and blue phosphors. Believe it or not, these three are the only true primary colors. Though it doesn't seem as intuitive, yellow is a combination of red and green, and violet looks reddish blue because it's between the blue frequency and the doubled frequency of red.

Subscript Ka, Ku ?[edit]

If anyone thinks that the "a" and "u" in the K-band links should be subscripted, here's the code to do it.

Microwave spectrum: V band | K band: Ka band, Ku band | X band | C band | S band | L band

I tried it and found it ugly, so I haven't put that stuff in, but others may think differently about it.

Atlant 17:49, 10 March 2006 (UTC)

Radio spectrum added[edit]

I've added a sub-table for the radio spectrum. I think it's a useful addition to a template that claims to describe the EM spectrum, but I'm not entirely satisfied with it for two reasons:

  1. It overlaps but doesn't completely replace the functioning of the existing "radio_spectrum" template (no frequency chart here), and
  2. Its EHF and SHF catagories overlap the Microwave category.

I'll try to continue improving this, but if anyone else wants to jump in, please feel free!

Atlant 13:20, 29 March 2006 (UTC)


Indigo should be put back onto the template as it is recognized as being a part of the em spectrum. -- Wikipedical 00:44, 1 November 2006 (UTC)

See further up this talk page for info about indigo. Georgia guy 00:56, 1 November 2006 (UTC)
Besides one or two objections, that section does not show any consensus. -- Wikipedical 01:10, 1 November 2006 (UTC)

It's necessary to use the right tone of indigo which approximates spectrum indigo. The tone of indigo that approximates spectrum indigo is called electric indigo. Keraunos (talk) 21:19, 19 April 2010 (UTC)

Chartreuse green, spring green, and cyan should also be included as spectrum colors, but they are not included solely because it is not traditional to do so; it is only traditional to depict the spectrum as having the seven colors originally assigned to it by Isaac Newton. If chartreuse, spring green, and cyan were included, that would make ten spectrum colors. How one divides up the spectrum is somewhat arbitrary because it is a continuum of color. Keraunos (talk) 21:30, 19 April 2010 (UTC)

What about adding some color ? Request for votes/comments[edit]

Proposal as below nextto "Visible (optical) spectrum:":

The Electromagnetic Spectrum
(Sorted by wavelength, short to long)
Gamma rayX-rayUltravioletVisible spectrumInfraredTerahertz radiationMicrowaveRadio waves
Visible (optical) spectrum: Violet Blue Green Yellow Orange Red
Microwave spectrum: W bandV bandK band: Ka band, Ku bandX bandC bandS bandL band
Wavelength designations: MicrowaveShortwaveMediumwaveLongwave
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