Tuesday, May 29, 2012

Light through the Ages








The making of, and working with light has since then progressed greatly. The early Egyptians and Babylonians used fats and oils in sturdy metal bowls. Sundials, created around 1500 BC, used light to tell time. The Greeks made pottery lamps, the first easy and cheaply made lamp that could be made available to all. Originally there were only red LEDs but eventually they were produced in green, then blue, and finally white.

It wasn't until 1877 that incandescent lighting was invented by Tomas Alva Edison. From there the Edison Lamp, a lighting that used a heated material to produce light, was patented in 1979. The rate at which new lighting was invented and the use of that light or sunlight itself was rising dramatically. In 1880 the first photocell was created to turn sunlight into energy by Charles Tainter.

The discovery of fire, most likely by accident with a strike of lightning to a tree, changed all that. Suddenly man had an edge to protect himself with. Able to watch out into the darkness or even work later into the evening hours increased their potential. Having light was of such importance now that cultures personified and worshiped it, as in the case of the Greeks with Hyperion and Artemis.

Theories about
light would continue to grow as time passed. Many great thinkers like Leonardo DaVinci and Galileo would ponder its secrets. In 1666 Sir Isaac Newton discovered that light was actually a wide spectrum, not all of which was visible by humans. Their theories and discoveries would lead to many more advancements in lighting. Light sources were becoming easier to find in more places.

Perhaps one of the greatest discoveries that aided the progression was that of electricity. Benjamin Franklin, who is well known for his works with electricity, is commonly thought of as being the father of our electrical age. Electricity was used for lighting even before the invention of the light bulb. It wasn't until 1965 the LED or light emitting diode was invented.


TedsWoodworking Plans and Projects