1895

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Incandescent lamps, often referred to as light bulbs, are the most easily recognized type of electric lamp. Incandescent lamps produce light when a thin metal wire, known as the filament, is heated until it glows. The gases in the envelope that are used to fill the lamp also play an important role in the electrical and thermal characteristics of the lamp, as well as its ability to produce light.

Incandescent lamps convert electricity into light by heating a wire filament using an electric arc. The wire is heated to a white-hot temperature, which causes it to emit light. The wire itself is typically made of tungsten, and the arc of electricity is generally created by passing a current through a carbon filament or small gas tube. The current passing through the filament creates a voltage drop, which causes the wire to heat up. As this wire heats up, it emits light, creating the visible light that we can see.

Neon lamps are a type of electric lamp that uses a particular type of gas to produce light. These lamps are composed of a sealed glass tube that contains neon gas at low pressure. An electrode at each end of the tube is connected to a current source. When the current passes through the gas, the gas molecules gain energy and release light in the visible spectrum.

Neon lamps are commonly used for decorative and advertising lighting, as well as in signs and displays. They are frequently used in areas where space is limited since their small size allows them to be used in a variety of places. The bright, colorful light produced by neon lamps makes them popular for attractive displays, and the low operating temperature makes them a good choice for many applications. Unlike incandescent lamps, neon lamps produce little heat, which makes them an excellent energy efficient choice.

The application field and working principle of both incandescent lamps and neon lamps have been established since 1895. There have been improvements in the materials used for filaments, the gases employed and the controlling electronics in the intervening decade, but the essential working principles have remained the same. In particular, the two technologies remain very energy efficient, and recent advances have focused on increasing the efficiency even further.

In conclusion, the application field and working principles of both incandescent lamps and neon lamps have been known since 1895. Since then, improvements in materials, gases, and electronics have made these lamps even more energy efficient. Despite the advances, the fundamental principles of their operation remain unchanged, and they continue to provide reliable, attractive, and efficient lighting.

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