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An Invention that Changed the World
The modern world is surrounded by thousands of electronic devices, many of which deserve a place on a list of significant inventions. The light bulb, however, has changed the world by illuminating the night and making it easier to perform a wide range of activities. People no longer have to restrict their work habits to the period from dawn to dusk. As a result of Thomas Edison's tireless efforts in 187, the world can easily function 4 hours a day. The idea for electric lighting occurred well before Edison's time, however.
In 180, Sir Humphrey Davy discovered that by passing an electric current through strips of metal, he could make them hot enough to glow brightly for a few seconds before burning up. However, this device, known as an arc lamp, was impractical for most uses. The light was simply too bright to be used in residences and most businesses. The lamp also required a tremendous source of power to operate. As time went on, electric generators were invented that could supply the arc lamp with power. Soon, streets and other outdoor public areas were filled with these lamps. However, there was still no suitable light invented for indoor use. Thomas Edison dedicated many years to find a solution to this problem.
The primary hurdle for Edison was creating a long-lasting and high-temperature filament. Edison and his associates tested over 1600 materials including horsehair, coconut fibers, fishing line, and even spider webs to find the best filament. Finally, Edison thought of using carbonized thread as the material. Edison's team inserted the thread into a glass bulb, forced out the air with a vacuum pump, and sealed the glass. When connected to an electric current, the bulb glowed steadily for more than 1 hours. Within a few weeks, Edison improved his bulb allowing it to glow many hours longer.
Light bulb improvements are still being made today. Fluorescent bulbs now operate using only one fourth as much energy as the standard incandescent bulb. These lights also give off 0% less heat and can last up to 1,000 hours. In addition, fluorescent bulbs are offered in a large array of styles and colors. Another new product is the halogen bulb. This bulb produces a much brighter light than a fluorescent or incandescent bulb, though it is more expensive. The improvements of the light bulb are only a small part of its value.
The light bulb is historically significant in many ways. This invention created a society where work and other activities could be performed without the aid of sunlight. Illuminated street signs were utilized to help travelers find their route. Sporting events and other activities could be held in the cooler temperatures of the evening hours. People were also given the sense of security and comfort often associated with light. However, the light bulb's historical significance is mainly due to the impact it had on the 0th century. The light bulb was a catalyst to many other discoveries. Through the use of light bulbs, viewing motion pictures on a large screen became possible. A few years later, the creation of the television replaced radios as the primary source of information. Even laser technology, which is used in industrial processing and surgical procedures, stems from the light bulb. Obviously, the light bulb has more significance than just allowing us to see in the dark. This invention, and the technologies derived from it, has helped develop the global economy and create a society that can operate 4 hours a day.
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