Much of what we see is the result of complex processes happening in our brains. I had a discussion online yesterday with someone who thought that projectors might be used to darken a screen down by projecting black at it. The reality is that projectors are instruments of light. They can make things brighter, but not darker. For many people, this raises the question: How, then, do projectors show things that are black on a white screen?
The video that follows is an exploration of that question.
The full transcript of the subtitles is available at
http://scenicandlighting.com/51-shades-of-grey-how-we-see-light-and-dark/
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