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light can be trapped by total internal reflection inside a bent a glass rod and 'piped' along a curved path,A single very thin glass fibre behaves in the same way. if several thousand such fibres are trapped together a flexible light pipe is obtained that can be used, for example, by doctors as an 'endoscope', to obtain an image of an internal organ in the body, by engineers to light up some awkward sport for inspection.the latest telephone 'cable' are optical (very pure glass) fibres carrying information as pulses of laser light.
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What input device can be used for marking a multiple choice test?
When a multiple choice test is answered, a pencil mark is drawn in a small area (often looking like this [ A ] before completion) on an answer sheet to indicate the chosen response. The sheets are then fed into a machine which automatically reads the position of these marks, relays this information to a computer which interprets the data, processes it against a programmed data base and produces a response. In a test, the result is displayed as marks or a percentage. The system can also be used to compile reports or supply a fast way of entering numbers for a lottery draw.The machine that reads the sheets is called an Optical Mark Reader (OMR for short). It works by light reflecting off the paper being picked up by a sensor. Where there are marks, less light is reflected and the relative position of the mark indicates the answer given. The position of the marks is calculated with the help of fixed marks on the paper which indicate the origin point. Some machines are programmed so that it doesn't matter which way round the paper is inserted, it still gives the desired data.The system does rely on the use of specific forms: blank paper with lots of pencil dots is not an option!
What organs are often called washing machines for the blood?
Kidneys.
The connection between your computer at home and your local ISP is often called the last mile?
last mile
Why computer system often called a two-state machine?
It only has 2 digit,0s and 1s (on and off switch)
What is it called when you take different video clips and merge them together called?
Hi, generally, putting two or more video clips together is called video joining or merging. Such a task is always done by a video joiner and merger. I often do that by way of Joyoshare Video Joiner. This tool lets me enjoy the process.
What does optical system mean?
"Optical" means related to light, often to visible light. So, a system that works with light.
Why are optical fibers often called pipes?
Fiber optic cables are flexible because they are made out of plastic that refracts light and keeps it inside the cable. The light pretty much bounces its way down the inside of the cable by passing through different layers of plastic that bend the light and keeps it moving towards one direction.
What form of radiation is used inside optical fibers?
Light is, but not necessarily the visible kind. For glass fibers, we use light in the infrared region, which has wavelengths longer than visible light, typically around 850, 1300 and 1550 nm. Those are used because the attenuation of the fiber is much less at those wavelengths. The attenuation of glass optical fiber is caused by two factors, absorption and scattering. Absorption occurs in several specific wavelengths called water bands due to the absorption by minute amounts of water vapor in the glass. Plastic optical fiber is made from materials that have lower absorption at shorter wavelengths, so red light at 650 nm is often used with plastic fiber.
Light travels in a material with greater .......?
Optical Density. Which often is caused by normal density.
What is optical communication?
An optical fiber is a flexible, transparent fiber made of very pure glass (silica) not much bigger than a human hair that acts as a waveguide, or "light pipe", to transmit light between the two ends of the fiber. The field of applied science and engineering concerned with the design and application of optical fibers is known as fiber optics. Optical fibers are widely used in fiber-optic communications, which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communication. Fibers are used instead of metal wires because signals travel along them with less loss and are also immune to electromagnetic interference. Fibers are also used for illumination, and are wrapped in bundles so they can be used to carry images, thus allowing viewing in tight spaces. Specially designed fibers are used for a variety of other applications, including sensors and fiber lasers.
What is the optical illusion caused by atmospheric conditions?
A mirage is an optical illusion which is caused by atmospheric conditions. This is often due to the refraction of light from the sky by heated air.
What is an optical device that is often used to refract white light called?
A prism. This will also split the white light. The prism is the most commonly used in experiments and demonstrations. However, there are other shaped tools that are sometimes used.
Why is escher's work often called a form of optical art?
Because that is what it is. It creates optical effects, makes us see things which are impossible or seem to be what they are not.
Which microscope is often used to view metal surfaces?
Metal samples among others can be viewed by a light microscope. The light microscope, also known as an optical microscope, can view microorganisms.
What uses fiber optic cables?
Optical fibers are utilized regularly as a way to transmit light between the two finishes of the fiber and find wide use in fiber-optic correspondences, where they allow transmission over longer separations and at higher transfer speeds (information rates) than wire links.
Why is chemiluminescence called a cold light?
Because almost no heat is produced during this reaction. That is why it is often called "cold light".
What optical illusion is often seen in deserts?
A mirage
