Talk:Light

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Former good article nominee Light was a good articles nominee, but did not meet the good article criteria at the time. There are suggestions below for improving the article. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake.
April 8, 2006 Good article nominee Not listed
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edit·history·watch·refresh Stock post message.svg To-do list for Light:

Restructure according to the guidelines proposed in Wikipedia:WikiProject Science, ie. with the following main sections:

  • Introduction : importance of light for life and humans; brief history of the understanding of light; sources of light (man-made or natural)
  • Light in practice: (avoid theory here)
    • Types of light: normal(incandscent, fluorescent) HID (football stadium lights) New eco-watt fluorescent lights and how they change they way colors look., laser; visible vs infrared
    • Properties of light: Spectral characteristics, brightness, color, frequency, coherence, modulation, speed of light
    • Light in the Universe: appearance of light after big bang, sources of light, ...
    • Light in everyday life: How different light effect humans (depression), everyday sources, human eye
    • Light in industry: sources, conversion from/to electricity; some applications of light (laser, ...); application of optics
    • Light in science: spectroscopy, astronomy, interferometry (If tht were important, than it should be in those sections)
  • Light in theory: introduce quantum electrodynamics, explain how the current theory explains light and its applications
  • History
    • Older theories of light
    • History of measurement of the speed of light
Priority 1 (top)


Typo[edit]

"liqht" in Quantum Theory, 1st paragraph, last sentence

Fixed. Thanks for catching it. Deli nk (talk) 12:35, 20 May 2015 (UTC)

Nanometres[edit]

In the first paragraph:

"400–700 nanometres (nm), or 4.00 × 10−11 to 7.00 × 10−11 m"

Is my math off, or should that say "4.00 x 10-7 to 7.00 x 10-7 m"?

Thanks. — Preceding unsigned comment added by 70.164.112.231 (talk) 00:15, 29 October 2015 (UTC)

Yes, it should be "4.00 x 10-7 to 7.00 x 10-7 m".
Juggernaut93 (talk) 17:20, 7 November 2015 (UTC)

In regard to the "Quantum Theory" subsection of section "Historical theories about light, in chronological order"[edit]

I believe that some reference should be made to Planck's description of light as "packets" (or in this case, energy elements) in more detail. I suggest that evidence from the Wikipedia article Photon can be used. Thank you. The Pokémon Fan (talk) 14:25, 23 November 2015 (UTC)

Semi-protected edit request on 30 November 2015[edit]

In the opening paragraph, the fragment below appears. The author provided a conversion of nanometers to scientific notation in meters, but incorrectly subtracted 2 from the exponent instead of adding 2 when converting 400 to 4.00 and 700 to 7.00.

Here is the approximated fragment at issue:

400–700 nanometres (nm), or 4.00 × 10−11 to 7.00 × 10−11

it should be changed to:

400–700 nanometres (nm), or 4.00 × 10−7 to 7.00 × 10−7

Devanssjc (talk) 16:50, 30 November 2015 (UTC)

Yes check.svg Done RudolfRed (talk) 02:00, 1 December 2015 (UTC)

empedocles light from your eyes[edit]

When shining a light at the cat his eyes glow,but when he turns his head you can not see the light that is coming out,so you can not use that light to see in the dark. While thinking about photons passing though hole I made a small hole with my fingurs just enough for the light to show through. With one eye closed I looked through the hole at the light what I saw has a pattern thats when I realizes I could see my eye!when at arms you can see the front of the but as you get closer you can see the inside of your eye. you can also do this with a playing by poking a small hole. Once you see it you will see it every where. My guess is the light from your eyes forms a tubes that catches the light goes to your eye when brakes up in to colors.173.165.48.76 (talk) 19:18, 18 December 2015 (UTC)

Semi-protected edit request on 24 December 2015[edit]

Red information icon with gradient background.svg Not done: Edit requests must be of the form "please change X to Y" Chamith (talk) 06:16, 24 December 2015 (UTC)
What was the request? Martin Hogbin (talk) 09:44, 24 December 2015 (UTC)
There wasn't one. It was empty. I was initially going to remove the request then decided not to in case the requester wants to request again (but properly this time). -- Chamith (talk) 14:23, 24 December 2015 (UTC)