Timeline for What does the "true" visible light spectrum look like?
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Feb 14, 2021 at 9:31 | comment | added | IceGlasses | Nitpick, but unless you have a very expensive monitor there are not three colors of LEDs in it. There are white LEDs (technically blue LEDs with a yellow phosphor) for backlighting and red, green, and blue filters for each pixel shuttered by liquid crystal. | |
| Feb 13, 2021 at 0:38 | comment | added | TCooper | @philipxy Rather than just disagree, here's a nice question/answer from this SE with more detail: "So the way to make light that appears purple is to mix the 400nm violet light (or even blueish light with a slightly longer wavelength) with the 700nm red light (or even orange light with a slightly shorter wavelength)." physics.stackexchange.com/questions/122601/… | |
| Feb 12, 2021 at 12:39 | comment | added | Gilbert | @philipxy how do you suppose your TV makes “purple” light from its red, green, and blue pixels? It doesn’t magically start producing 410 nm wavelengths. | |
| Feb 12, 2021 at 7:04 | comment | added | Random832 | @philipxy purple is absolutely a mix of blue and red light [in fact, it does not exist at all as a pure wavelength]. You may be reaching for a distinction between "purple" and "magenta", but purple is really just dark magenta [and brown is dark orange], and in terms of light it's simply... less light. | |
| Feb 11, 2021 at 22:17 | comment | added | philipxy | "Want purple? Mix blue and red." No, that's mixing paint, not light. | |
| Feb 11, 2021 at 5:08 | comment | added | Gilbert | @Alex is this question just a curiosity, or is there some application behind it? If you really need an accurate rainbow, generate one on your desk directly with some sort of prism. Then take a picture of it and adjust the color values pixel by pixel so that the one on your monitor best matches the one on your desk. | |
| Feb 11, 2021 at 3:51 | comment | added | Alex | What, then, is the best computer representation of the visible light spectrum? | |
| Feb 11, 2021 at 3:09 | history | answered | Gilbert | CC BY-SA 4.0 |