LASER POINTER Meaning and
Definition
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A laser pointer refers to a handheld, compact, and portable device that emits a coherent beam of light, also known as laser radiation, typically at a wavelength of 532 nanometers, which appears as a bright, focused, and clearly visible light dot at the pointing location. The device is commonly powered by batteries and designed for the purpose of highlighting or directing attention to specific targets or objects.
Generally, a laser pointer features a streamlined pen-like structure with a push-button mechanism to activate the laser beam. The laser beam is generated through the process of stimulated emission, wherein an active medium, such as a crystal or a gas, is excited and stimulated by an electrical discharge, resulting in the emission of the coherent laser light. This coherent light beam is then emitted through an aperture and focused by a lens system, which ensures the concentration of the light at a specific point of aim.
Laser pointers are frequently used in various professional, educational, and entertainment settings. They serve as effective tools during presentations, lectures, and public speaking engagements, allowing presenters to direct attention to specific details or parts of a visual aid. Additionally, laser pointers find applications in astronomy, where astronomers use them to point out celestial objects and constellations during stargazing or educational sessions. It is essential to use laser pointers responsibly and within legal limits to avoid any potential harm or hazards to oneself or others.
Common Misspellings for LASER POINTER
- kaser pointer
- paser pointer
- oaser pointer
- lzser pointer
- lsser pointer
- lwser pointer
- lqser pointer
- laaer pointer
- lazer pointer
- laxer pointer
- lader pointer
- laeer pointer
- lawer pointer
- laswr pointer
- lassr pointer
- lasdr pointer
- lasrr pointer
- las4r pointer
- las3r pointer
- lasee pointer
Etymology of LASER POINTER
The word "laser pointer" combines two elements: "laser" and "pointer".
1. Laser: The term "laser" stands for "light amplification by stimulated emission of radiation". It was coined in 1957 as an acronym by Gordon Gould, an American physicist. The "laser" itself is a device that emits a beam of highly concentrated light consisting of photons. The term "laser" has its origins in the scientific field and is not an abbreviation of any specific words.
2. Pointer: The word "pointer" refers to an object used to direct attention or indicate something. It comes from the verb "point", which originates from Old English and has roots in the Proto-Germanic word "puntjaną". The concept of a "pointer" has been present in various contexts and languages for centuries, serving as a means to draw attention or guide someone's focus.
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