GLOW DISCHARGE Meaning and
Definition
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Glow discharge refers to a phenomenon in which a low-pressure gas or vapor emits a faint glow or light when an electric current is passed through it. It occurs within a controlled environment, such as a sealed glass tube or vacuum chamber, where the gas pressure is significantly reduced. This discharge is characterized by its distinct color, ranging from a pale blue to a vibrant purple, depending on the type of gas or vapor present.
In a glow discharge, the gas molecules or atoms in the tube become ionized due to the high electric field generated by the applied voltage. The electric field excites the gas particles, causing them to emit light as they return to their ground state. This glowing effect is the result of the photons being emitted by the excited gas particles.
Glow discharges are commonly observed in various applications, notably in electric lamps, fluorescence devices, and plasma displays. They are extensively utilized in scientific research, including spectroscopy, material processing, and surface modification. The ability to control the glow discharge parameters, such as pressure, voltage, and gas composition, enables scientists to investigate specific properties of the gas and its interactions with various materials.
Overall, glow discharge represents a fascinating phenomenon where electrically excited gas or vapor emits a visible glow, offering scientists valuable insights and multiple applications in various fields of science and technology.
Common Misspellings for GLOW DISCHARGE
- flow discharge
- vlow discharge
- blow discharge
- hlow discharge
- ylow discharge
- tlow discharge
- gkow discharge
- gpow discharge
- goow discharge
- gliw discharge
- glkw discharge
- gllw discharge
- glpw discharge
- gl0w discharge
- gl9w discharge
- gloq discharge
- gloa discharge
- glos discharge
- gloe discharge
- glo3 discharge
Etymology of GLOW DISCHARGE
The word "glow discharge" is composed of two parts:
1. Glow: The word "glow" is derived from Old English "glōwan" which meant "to shine or give off light". It can be traced back to the Proto-Germanic word "glōaną" meaning "to glow or burn". The term "glow" is often used to describe a soft, warm, and steady light emission.
2. Discharge: The word "discharge" comes from Middle English "dischargen" which meant "to unload or release". It is derived from Old French "descharger" meaning "to relieve or remove a load". The term "discharge" is used to describe the movement or release of electricity, gas, or other forms of energy.
When combined, "glow discharge" refers to a phenomenon where a low-pressure gas discharge produces a glowing plasma.
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