Look and see

We open the curtains and see the landscape. Grass, trees, mountains and perhaps some people. An 'ordinary' occurrence, unremarkable for those fortunate enough to be able to see. But what exactly happens in the process of vision? How are we made aware of distant objects? A picture is formed in our minds, apparently instantaneously, enabling us to visualize a whole scene. Somehow thousands of distant physical objects send us a series of messages, which our brain is able to unscramble and interpret.

Light is the messenger which brings us the information. Reflected from every leaf and every blade of grass, light is scattered in all directions. A tiny fraction of it happens to hit the eye. In an instant the information is coordinated to reconstruct the whole panorama!

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