Invented and patented by Thomas Edison in 1879, the incandescent bulb comprises of a wired filament placed inside a glass bulb (“The History”). When electricity is provided to the filament, it heats up thereby making the bulb glow and emit light (“Incandescent, LED”). The wired filament of the incandescent bulb was initially made using carbon obtained from a cotton thread that was uncoated. This filament gave the bulb a lifespan of just 14.5 hours. Later, the carbon filament was made using bamboo, which gave the bulb a longer lifespan of up to 1200 hours (“The History”). Much later, in ...
Essays on Phosphor
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Electron microscopes refer to those microscopes that make use of an electron beam to light a specimen producing a magnified image. These microscopes are used to study structures that are either invisible through naked eyes or those that are too small to be clearly seen using a light microscope. The two major types of electron microscope are Transmission Electron Microscopy or TEM and Scanning Electron Microscopy or SEM (Mooney, 1996). Transmission Electron Microscopy employs a high voltage electron beam in order to create an image (NE, 2013). The TEM is made up of various components including electromagnetic lens system, electron source, sample ...
Different parts of a car are made of different material. The choice of material to make different parts of a motor vehicle is influenced by factors like amount of stress handled by the part, cost of material compared to other alternatives and purpose of the part e.g. decoration etc. These are some of the factors the determine type of material a motor vehicle part is made of. An example of material and part on a car made using the material is given below. (A) Ferrous alloy 1.0 Part made of ferrous alloy
Engine components e.g. bolts and nuts, engine ducts and ...
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ORDER AN ESSAYDigital Panoramic Radiograph
This paper discusses the technology, principles, concepts and limitations of digital panoramic radiography, which is an emerging technique in dental radiology and is replacing conventional x-ray films. Some comparisons of digital techniques with conventional films have been made, and technical details of digital techniques are described.
Digital Panoramic Radiography
The radiographic film is a medium used for storing and displaying diagnostic information. The x-ray film, since its discovery in 1895, became the primary medium for obtaining radiographic images. Dental practitioners are particularly used to this modality and are comfortable with its technique, the quality and amount of information it provides, and its ease ...
1. Abstract With eth advent of computing devices, there has been a phenomenal growth in the adoption of electronic displays. There has been adoption of electronic displays in these environments. Even as the evolution of electronic devices is seen to be on the increase, there is a need to ensure that the electronic display devices are friendly to the environment and efficient for personal use. Emphasis is seen to be put on safety and green computing. There is also an emergence of hand-held devices which are being adopted at a fast rate and the use of electronic displays is highly adopted ...
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