definition of laser
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laser A laser is a coherent and focused beam of photons; coherent, in this context, means that it is all one wavelength, unlike ordinary light which showers on us in many wavelengths. The acronym laser stands for light amplification by stimulated emission of radiation.. Lasers work as a result of resonant effects. The output of a laser is a coherent electromagnetic field. In a coherent beam of electromagnetic energy, all the waves have the same frequency and phase.
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Lasers for Dummies What do you mean by laser “radiation”? Some lasers emit radiation in the form of light. Others emit radiation that is invisible to the eye, such as ultraviolet or infrared radiation. In general, laser radiation is not in itself harmful, and behaves much like ordinary light in its interaction with the body.
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- Full Definition of WAVELENGTH. 1. : the distance in the line of advance of a wave from any one point to the next point of corresponding phase. 2. See wavelength defined for English-language learners.See wavelength defined for kids. ADVERTISEMENT.ull Definition of WAVELENGTH. 1. : the distance in the line of advance of a wave from any one point to the next point of corresponding phase. 2. See wavelength defined for English-language learners. See wavelength defined for kids.
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Lasers Lasers are more than just powerful flashlights. The difference between ordinary light and laser light is like the difference between ripples in your bathtub and huge waves on the sea. You've probably noticed that if you move your hands back and forth in the bathtub you can make quite strong waves.
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Laser pointer Laser pointer. A laser pointer or laser pen is a small handheld device with a power source (usually a battery) and a laser diode emitting a very narrow coherent low-powered laser beam of visible light, intended to be used to highlight something of interest by illuminating it with a small bright spot of colored light.
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Falkland Islands wolf The Falkland Islands wolf, also known as the warrah and occasionally as the Falkland Islands dog, Falkland Islands fox, or Antarctic wolf, was the only native land mammal of the Falkland Islands. This endemic canid became extinct in 1876, the first known canid to have become extinct in historical times. It was the only modern species in the genus Dusicyon. Traditionally it had been supposed that the most closely related genus was Lycalopex, including the culpeo, which has been introduced to the Falkland Islands in modern times.
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Laser A laser consists of a gain medium, a mechanism to energize it, and something to provide optical feedback. The gain medium is a material with properties that allow it to amplify light by way of stimulated emission. Light of a specific wavelength that passes through the gain medium is amplified (increases in power).
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Laser A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term laser originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light coherently, spatia
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laser The acronym laser stands for light amplification by stimulated emission of radiation.. Lasers work as a result of resonant effects. The output of a laser is a coherent electromagnetic field. In a coherent beam of electromagnetic energy, all the waves have the same frequency and phase.nergy is introduced into the cavity from an external source; this is called pumping. As a result of pumping, an electromagnetic field appears inside the laser cavity at the natural (resonant) frequency of the atoms of the material that fills the cavity. The waves reflect back and forth between the mirrors.
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Light A triangular prism dispersing a beam of white light. The longer wavelengths (red) and the shorter wavelengths (blue) are separated. Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), or 4.00 × 10 −7 to 7.00 × 10 −7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).
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Compound Bow â Parts Of A Compound Bow Cams of a compound bow are round to oval metal discs which are held in place to the limbs via a pin and they are where the string and cable(s) terminate. They are attached at the end of the limbs and transfer the power of the limbs to the string and arrow during the shot.
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LASER LASER: Light Amplification by Stimulated Emission of Radiation: LASER: London and South East Region (Air Training Corps) LASER: Linking Academic Scholars to Educational Resources
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Light Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), or 4.00 × 10−7 to 7.00 × 10−7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).
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Photon Home » Photon. Definition. noun, plural: photons. (physics) A quantum unit of light energy or electromagnetic radiation. Supplement. A photon is a quantum of radiant energy with a visible wavelength. It is an elementary particle that is its own antiparticle. It is a discrete concentration of energy. It is a massless elementary particle that moves at the speed of light. It has no electric charge 1 and is stable.
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Questions and Answers Wow, great question... but to answer it completely I would have to take you all the way through college physics. Let me try anyway, but first let's define what a laser and laser light are. Laser is an acronym for Light Amplification by Stimulated Emission of Radiation. The next thing to consider is why laser light is different than other light.
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- When the first working laser was reported in 1960, it was described as a solution looking for a problem.. But before long the laser's distinctive qualities—its ability to generate an intense, very narrow beam of light of a single wavelength—were being harnessed for science, technology and medicine.hen the first laser appeared, scientists and engineers were not really prepared for it. Many people said to me—partly as a joke but also as a challenge—that the laser was a solution looking for a problem.. But by bringing together optics and electronics, lasers opened up vast new fields of science and technology.
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- Lasers in Cancer Treatment. The word LASER stands for L ight A mplification by S timulated E mission of R adiation. Laser light is different from regular light. The light from the sun or from a light bulb has many wavelengths and spreads out in all directions.
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What does LASER stand for? 12 definitions of LASER. Meaning of LASER. What does LASER stand for? LASER abbreviation. Define LASER at AcronymFinder.com
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How is a laser different from other light? White light is a mixture of many waves of different links called frequency, it's like musical instruments playing different notes, but the light from a laser contains waves of … one light only which make a single color.- It is coherent, that is, the waves of light of the laser are in phase. Just like two sea waves when they are both at their maximum height, all waves of the light in a laser are exactly at the same amplitude, all time. 3- It is highly directional. Laser light is emitted as a narrow beam in a specific direction.
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laser The term is an acronym for light amplification by stimulated emission of radiation. Lasers are used in the treatment of a variety of ocular conditions, especially of the cornea, the retina (e.g. detached retina, diabetic retinopathy), glaucoma and refractive errors.
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- Doctors use lasers to do delicate surgery, such as eye surgery. Lasers carry TV and telephone signals over special cables. Metal workers use lasers to cut and weld metal into everything from street light poles to cars. Workers in clothing factories use lasers to cut through hundreds of layers of fabric at once.irst, the light from a laser contains exactly one color or wavelength rather than a lot of different wavelengths. Scientists say that laser light is  monochromatic , meaning of one color. Flash is required to view this animation. Second, all the wavelengths are in phase.
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LASER • LASER (noun). The noun LASER has 1 sense: 1. an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light.Familiarity information: LASER used as a noun is very rare. LASER (noun). The noun LASER has 1 sense: 1. an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light.
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How does light from a laser differ from an ordinary light? Coherent. The light from a laser is said to be coherent, which means the wavelengths of the laser light are in phase in space and time. These three properties of laser light are what make it more of a hazard than ordinary light.oherent. The light from a laser is said to be coherent, which means the wavelengths of the laser light are in phase in space and time. These three properties of laser light are what make it more of a hazard than ordinary light.
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- As nouns the difference between lazer and laser is that lazer is while laser is a device that produces a monochromatic, coherent beam of light or laser can be a gum resin obtained from certain umbelliferous plants. As a verb laser is to cut with a. As nouns the difference between lazer and laser is that lazer is while laser is a device that produces a monochromatic, coherent beam of light or laser can be a gum resin obtained from certain umbelliferous plants.
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NCI Dictionary of Cancer Terms light therapy listen (… THAYR-uh-pee) The treatment of disease with certain types of light. Light therapy can use lasers, LED, fluorescent lamps, and ultraviolet or infrared radiation. Also called phototherapy.
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Definitions &Translations Laser. A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term laser originated as an acronym for Light Amplification by Stimulated Emission of Radiation.aser. A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term laser originated as an acronym for Light Amplification by Stimulated Emission of Radiation.