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Why is neon gas in an electric bulb?

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There is no vacuum in the electric bulb. Years ago there was a practice to leave vacuum inside the bulb so as to prevent the burning of the tungsten filament in the temperature of 2000° Celsius inside the bulb. read more

There is no vacuum in the electric bulb. Years ago there was a practice to leave vacuum inside the bulb so as to prevent the burning of the tungsten filament in the temperature of 2000° Celsius inside the bulb. But at such a high-temperature tungsten filament starts ‘evaporating’ slowly. read more

The Neon lamp is a low pressure gas discharge lamp. It is a cold cathode fluorescent lamp (CCFL). The term "Neon Lamp" is used to describe a CCFL with a tube diameter less than 15 millimeters. read more

There is no vacuum in the electric bulb. On the contrary, argon gas or argon gas mixed with a little nitrogen is filled in the bulb under some pressure. Years ago there was a practice to leave vacuum inside the bulb so as to prevent the burning of tungsten filament in the temperature of 2000° Celsius inside the bulb. read more

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Further Research

Neon and Argon Glow Lamps
www.edisontechcenter.org

What is a Neon Lamp?
www.azooptics.com