Light & Man
The effects of light on human beings are many and varied, and not all the effects are fully known. They go far beyond the simple process of recognizing objects.
Light gives rise to moods and emotions and affects our biorhythms. To understand these effects we need to know something of the physics, physiology, neurology and psychology of light.
Physiology
Despite its relatively simple construction, the human eye is capable of performing a number of astounding tasks that are very difficult for technical equipment to match.
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Perception
Of all the information that we take in from our surroundings, 80% comes through our eyes. The data transfer rate is ten times greater than for hearing. Three-dimensional or stereoscopic vision is possible because we have two eyes a certain distance apart.
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History
Long ago, the sun was the only source of light for the inhabitants of the Earth. 400,000 years ago Peking Man first used fire as a source of heat and light. 80,000 years ago Neanderthal Man learnt how to make fire so was not forced to keep the embers burning day and night.
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