Our brain filters and interprets what we see to help make sense of the World around us.
Simply measuring the light coming from a surface is not enough to understand the surface.
A white surface in shadow, for example, may reflect less light than a black surface in full day light.
Does the language you speak impact the way you think?
This question has occupied academics for centuries. Some people perceive deep differences between languages, which affect the minds of the people who speak them. Others argue
that the differences are superficial and, linguistically speaking, all humans are essentially equal.
I've often wondered how programming languages affect the people who program them, so I found Guy Deutscher's' delightful book "Through the Language Glass" both fascinating and enlightening.
One of the memorable moments was when he used the metaphor of organising a childrens party to explain the various approches to managing complexity. It certainly resonated with the audience (based on the conversation in pub afterwards - a wonderful XP day tradition).
Dave's now uploaded a version to YouTube... Fantastic stuff. I love the deadpan humour.