As the human race continue their quest for more knowledge and information, we have made so much progress in the way we do things over the last decade. Truly, the advancement of technology is never-ending, but the pivotal point of improvements in modern technology took place when laser was first invented. To date, the lasers sit near the top of any list of the greatest inventions of the last half of the 20th together with satellites, computers and the integrated circuits that are symbols of high technology.

What Is A Laser?

The word LASER was coined as an acronym for LIGHT AMPLIFICATION by the STIMULATED EMISSION RADIATION. This tells that laser is a special light. Stimulated emissions occur when an atom or molecule that is holding excess energy is stimulated to emit that energy as light.

To be more specific, laser is composed of photons, the basic unit of light. This tells us that laser has no mass, although it can behave as a particle. The brilliant light comes from the synchronized collisions of these photons.

Different Forms And Charactertistics of Laser

Wavelength: Each type of laser emits a characteristic wavelength or a small range of wavelength, depends on the kind of material that emits the laser life. Usually monochromatic (single colored). They emit a range of wavelength but the range is so narrow enough to be considered a single wavelength for most purposes.

Output Power: This measures the strength of a laser beam, which differs widely among others.

Duration of Emission: Lasers emit light in a steady beam or in pulses which comes in various durations and repetitions rates.

Beam Divergence and Size: This refers to the spreading out of light very slowly as it gets farther from the laser. Lasers are known for their high directionality.

Coherence: Light waves that travel in one direction composing of a single wavelength. They behave as parallel lights moving in unison.

Efficiency and Power Requirement: Lasers differ widely in how efficiently they convert input energy (electrical) into light.

Importance of Laser In Our World

Information Handling: This includes fiber optic communications, laser printers for computer output, paying digital audio discs and videodiscs, laser scanner used on check out counters of supermarkets to read bar-coded packages. You can see more examples of this when you go to to look for essential supplies for your pups.

Medicine: This includes laser surgery, laser eye treatment and encoding genetic messages that determine hereditary traits from the action of viruses, enzymes and DNA molecules.