Flashlight
Japanese Name:
懐中電灯
Romaji Name:
kaichuudentou
Description
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A flashlight is a portable handheld device that produces light using batteries and a bulb or LED. It is used to illuminate dark areas and is commonly used during power outages, outdoor activities, or emergencies.
History
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Before the invention of flashlights, people used candles, oil lamps, and gas lamps to provide light. However, these sources were not portable, and they had limitations like fire hazards and the need for refueling.
The first practical flashlight was invented in 1898 by George J. L. B. (G. J. L. B.) of American Electrical Company. He developed a device that used carbon filament and a battery to produce a portable electric light.
However, early flashlights were unreliable because the battery was not as powerful as it is today, and the materials used were often not efficient for long-lasting light.
World War II saw flashlights used extensively by soldiers, and after the war, the flashlight became an essential tool for civilian use as well.
By the 1950s and 1960s, flashlights became smaller, more portable, and more efficient, with improvements in bulb technology (including the advent of incandescent bulbs).