Science and Engineering


What Color Do You See?

The world is full of light from sources like the sun, a bulb, or a computer screen. It bounces off objects, and some of it finds its way into your eyes. This is how visual information about the world enters your vision system.

Between bounces, light usually travels in straight lines called rays. This fact is hardwired into your brain, and it's how you form a mental picture of the world around you from an image.

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