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The History of Light

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The main source of natural light on Earth is the Sun.

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Timeline of Lighting Technology

Before Electricity

🠶 Fire

🠶 Candle

🠶 Torch

🠶 Oil Lamp

🠶 Gas Lamp

After Electricity

🠶 Gas Discharge Lamp

🠶 Arc Lamp

🠶 Mercury-Vapor Lamp

🠶 Light Bulb

🠶 Flourescent Lamp

🠶 Halogen Lamp

🠶 LED(Light Emitting Diode)

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Fire (B.C. 1.4 million years)

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Candle (3000 B.C. )

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Torch (B.C.1300)

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Oil Lamp (10,300 - 8000 BC)

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Gas Lamp

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After Electricity

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GAS DISCHARGE LAMP

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ARC LAMP

🠶 It produces a bright white light that closely mimics natural sunlight.

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LIGHT BULB

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🠶 English Joseph Wilson and American Thomas Alva Edison invented light bulbs with a longer lifespan in the same year.

🠶 In 1880 Thomas Edison made a lightbulb with an even longer lifespan.

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FLORUESCENT

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HALOGEN LAMP

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A halogen lamp is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added.

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LED (Light-Emitting Diode)

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LASER(Light Amplification by Stimulated Emission of Radiation)

🠶 The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation".