What Does The Word Laser Stand For On What Basic Principle Does It Work?

What is laser and its characteristics?

Laser radiation has the following important characteristics over ordinary light source.

They are: i) monochromaticity, ii) directionality, iii) coherence and iv) brightness.

i.e., if the frequency of radiation is 10 15 Hz, then the width of line will be 1 Hz.

So, laser radiation is said to be highly monochromatic..

What color laser is the strongest?

green lasersAs a general rule, green lasers are 532nm are 5-7X brighter than any other laser color, at the same power. Whether blue, red, purple/violet, or a light color like yellow, green is the best at strength for visibility.

Why laser is used in holography?

Lasers for white light holography. … The hologram is a 3D representation of the object as the interference pattern includes phase information of the reflected light. In single color holography, a single laser is used to record the hologram, either by exposing the object in real life or from a 3D CAD file.

What is the basic principle of laser?

To explain the process of light amplification in a laser requires an understanding of the energy transition phenomena in the atoms of its active medium. They include: spontaneous emission, stimulated emission/absorption and non-radiative decay.

What is laser in simple words?

The Short Answer: A laser is produces a very narrow beam of light that is useful in many technologies and instruments. The letters in the word laser stand for Light Amplification by Stimulated Emission of Radiation. The letters in the word laser stand for Light Amplification by Stimulated Emission of Radiation.

What is laser and how it works?

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”.

What are applications of laser?

Laser ApplicationsMedical applicationsWelding and CuttingSurveyingGarment industryLaser nuclear fusionCommunicationLaser printingCDs and optical discsSpectroscopyHeat treatmentBarcode scannersLaser cooling

What are the three processes of laser action?

We may conclude that, laser action is preceded by three processes, namely, absorption, spontaneous emission and stimulated emission – absorption of energy to populate upper levels, spontaneous emission to produce the initial photons for stimulation and finally, stimulated emission for generation of coherent output or …

What stops a laser beam?

The best way to stop a laser is to use a mirror to send it away or put some object in the way. The object will absorb the light from the laser much like your clothes absorb some of the light from around you.

What are the conditions for the operation of a laser?

(i) the system must be in a state of population inversion. (ii) the excited state of the system should be in metastable state. (iii) the atom should be in lower energy state.

What is the principle of laser diode?

The laser diode is forward-biased by an external voltage source. As electrons move through the junction, recombination occurs just as in an ordinary diode. As electrons fall into holes to recombine, photons are released. A released photon can strike an atom, causing another photon to be released.

What are the 3 types of lasers?

Lasers are commonly designated by the type of lasing material employed. There are four types which are: solid state, gas, dye, and semiconductor. The characteristics of each type will be described. Solid State Lasers employ a lasing material distributed in a solid matrix.

What is the unique property of laser?

Laser has certain unique properties, namely, high monochromaticity, coherence and directionality, compared to ordinary sources of light, though both are electromagnetic radiations.

What is the function of laser printer?

Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a “drum” to define a differentially charged image.

What are the advantages of laser?

The advantages of laser cutting are flexibility, precision, repeatability, speed, cost-effectiveness, great quality, contactless cutting, versatility and automation possibilities.Flexibility. … Precision. … Repeatability. … Speed. … Automation. … Quality.Contactless Cutting. … Versatility.More items…•

What is laser and its types?

Lasers are often described by the kind of lasing medium they use – solid state, gas, excimer, dye, or semiconductor. Solid state lasers have lasing material distributed in a solid matrix, e.g., the ruby or neodymium-YAG (yttrium aluminum garnet) lasers. The neodymium-YAG laser emits infrared light at 1.064 micrometers.