HackerTube

The Weird World in RGB

Technology Connections1 HN recommenders · 2020–2021
2.7M views · explainer · evergreen · Uploaded 2019-08-28

Technology Connections explains how RGB light and color work, from hue and saturation to color vision and how objects appear under different lighting. It uses a studio setup with colored lights to demonstrate the effects.

HN points to it as an accessible explanation of how color and reflected light behave, especially under LED lighting.

Graphic design & typographyEveryday physics & science demosNeuroscience & the brain

Watch on YouTube

3 comments from Hacker News

@lathiat2020 · in “Short History of LED Lighting”

This works for direct illumination (eg an LCD screen) but fails for reflected light (eg a light). This video from Technology Connections helps explain [VIDEO]

RecommendsView on HN
@zinekeller2021 · in “Perseverance Rover lands on Mars [video]”

Short answer: No. We (the majority anyway, as some are colourblind) only perceive lightness, reddish, greenish, and bluish. The brain uses the info and effectively synthesises the image in our brains. Long answer: Colour is a very rabbithole topic but Captain Disillusion has a summary of it ( [LINK] ) and Technology Connections has a discussion ( [VIDEO] ).

CitesView on HN
@goblin892021 · in “Japanese Philosophies That'll Help You Spend Money Consciously”

Why would you do that I don't know, but for me personally the reason is that LEDs tend to strobe (sometimes noticeably to peripheral vision) and do not emit a smooth continuous spectrum—unlike incandescent bulbs, they produce a narrow, spiky spectrum[0] and objects in your room may look unnatural as they reflect it[1]; this may be especially bad with some RGB LEDs but fundamentally is a property of all LED lights because physics. [0] [LINK] [1] [VIDEO]

CitesView on HN