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this post was submitted on 27 Jan 2024
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Ask Lemmy
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Thats another thing I don't get. Itf you look at your tv screen real close its all red/green/blue. Every pixel/cell, how does it appear different from far away
Okay you really want to fuck with your mind, brown is not a color. You can't not break down a rainbow and find brown anywhere in it. There is no such thing as brown light. Yet you can see it every day.
Isn't pink generally the same phenomenon? Something about it being the "absence of green light" rather than its own distinct spot on the visible spectrum.
So how the heck is it rendered?
If I am remembering correctly it is mostly just a crap shade of red.
This is a much better explanation than I can give
https://youtu.be/wh4aWZRtTwU?feature=shared
Human eyes have three kinds of cells (photoreceptors) for color detection. They each react to either red, green or blue light. If more than one of those cells are activated, your brain interprets the light based on what cells activated, and how strongly they activated. If red and green cells activates, the light is seen as yellow. The light is seen as white if all of them activates fully.
This also means that light bulbs can produce white light by simply producing three wavelengths (colors) of light. The problem with that kind of “fake” white is that colors will look wrong under such light due to the way how objects reflects light. This is very common with low quality LED lights, and even the best smart lights aren't very good at it. When buying LED lights, you might want to look at the CRI (Color Rendering Index) value and make sure it's above 90, or as high as possible.