A coil of tungsten wire suspended in a vacuum or inert gas-filled bulb. When electricity flows thru the tungsten "filament" it radiates energy in the form of heat and light. This is the basic operation of inefficient incandescent lamps.
Filament wires are the Cathode of the VFD. They are made of tungsten wire coated barium, strontium and calcium oxides. Application of a specified voltage raises the temperature of the filament, which causes thermionic emission.
A tungsten wire purposely positioned inside a lamp bulb, that when heated electrically generates radiation in the visible, infrared and ultraviolet ranges. Tungsten material replaced carbon almost universally, as it has great tensible strength, and is very durable. However, the basic reason for its selection as the best filament material is the fact that it can be burned very near its melting point without evaporating rapidly. Lamp filaments are offered in a variety of designs optimized for specific applications.
A tungsten wire purposely positioned inside a lamp bulb, that when heated electrically generates radiation in the visible, infrared and ultraviolet ranges. Tungsten material is most often used, as it has great tensile strength, is very durable, and can be heated very near its melting point without evaporating rapidly. Lamp filaments are offered in a variety of designs optimized for specific applications.
The smallest unit of a fibrous material. The basic units formed during spinning and which are gathered into strands of fiber, (for use in composites). Filaments usually are of extreme length and of very small diameter. Filaments normally are not used individually. Some textile filaments can function as a yarn when they are of sufficient strength and flexibility.
The finished fibre used in sheer hosiery is called filament yarn. It is characterised by continuous length and is extruded either as monofilament yarns, which is composed of one single strand, or multifilament yarn which is made up of several filaments bundled together.
This is like a metallic thread that has been flattened. It comes in many colors, it glitters, and golds and silvers are popular. It is normally sewn using two or three threads of filament in a needle, or with one strand of filament and one or two strands of floss. It is known as a 'blending filament'.
(1) A continuous thread of a specified diameter, e.g. silk (natural fibre) or rayon (synthetic fibre); the opposite of a fibre with a finite length, such as wool or cotton (2) A variety of fiber characterized by extreme length, which permits its use in yarn with little or no twist and usually without the spinning operation required for fibers
A structure in the corona consisting of cool plasma supported by magnetic fields. Filaments are dark structures when seen against the bright solar disk, but appear bright when seen over the solar limb, Filaments seen over the limb are also known as prominences. more
A mass of gas suspended over the photosphere by magnetic fields and seen as dark lines threaded over the solar disk. A filament on the limb of the Sun seen in emission against the dark sky is called a prominence.
A solar prominence which is seen as a dark streak against the bright disc of the Sun, and appears as bright streams of plasma in the solar corona which appear to radiate away from the Sun when seen off the solar limb.
(a) A feature of the solar surface seen in Ha as a thin, dark wavy line. A filament is a prominence projected on the solar disk. (b) In microbiology, a collective term for the cylindrical external sheath and cellular internal trichome of a filamentous prokaryote.
A strand of cool gas suspended over the photosphere by magnetic fields, which appears dark as seen against the disk of the Sun; a filament on the limb of the Sun seen in emission against the dark sky is called a prominence.
Dark, sinuous ribbon observed on the solar disk. Filaments consist of higher density, and lower temperature material supported by solar magnetic fields that absorb the relatively intense disk emission (for example, as seen in HÎ± emission of neutral hydrogen). As these features rotate across the sun's limb they appear as quiescent prominences and are seen in elevation above the edge of the sun.