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laser
[ ley-zer ]
noun
- a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase.
laser
1/ ˈleɪzə /
noun
- a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium. The photons involved in the emission process all have the same energy and phase so that the laser beam is monochromatic and coherent, allowing it to be brought to a fine focus
- any similar source producing a beam of any electromagnetic radiation, such as infrared or microwave radiation
verb
- to use a laser on (something), esp as part of medical treatment
- often foll by off to remove (a tattoo, fat, etc) with laser treatment
Laser
2/ ˈleɪzə /
noun
- a type of dinghy, designed to be sailed by one person
laser
/ lā′zər /
- Short for light amplification by stimulated emission of radiation. A device that creates and amplifies electromagnetic radiation of a specific frequency through the process of stimulated emission . The radiation emitted by a laser consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have many uses, such as cutting hard or delicate substances, reading data from compact disks and other storage devices, and establishing straight lines in geographical surveying.
Word History and Origins
Origin of laser1
Word History and Origins
Origin of laser1
A Closer Look
Example Sentences
You can use powerful lasers to measure the distance of these objects, like radar or sonar.
This Raman spectroscopy shines laser light on a sample, then measures how the light bounces off.
SHERLOC, or Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals, will take similar measurements using an ultraviolet laser.
In one incident, a man is accused of aiming a laser pointer at a police helicopter.
Carbon, oxygen, nitrogen and other more complex substances must be available for life to both evolve and build radio transmitters or lasers to send signals through space.
Initially, it will be able to carry 1,000-pound satellite-guided bombs or 500-pound laser-guided weapons.
Where these laser-like missiles are falling out of the sky onto a city and you have to stop each of them from hitting the targets?
“The laser-wielding robot is a real threat,” Hetflaisz says.
Obama is widely believed to tap an ex-physicist who cuts military waste like a laser to become the next secretary of defense.
Green laser pointers shined in the faces of men in uniforms looking down from the roof of the National Palace.
Then, as though finding an error, he halted its operation and swung the laser-head back away from the work piece.
Casually, without even looking at the Security man, he had somehow centered the laser directly on him.
The theory behind the heat projector was simply an extension of the laser theory, plus a few refinements.
Or, I should say, the thing that is supposed to look like a laser component.
It looked like a keychain laser-pointer, or maybe a novelty light-saber.
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