Lasers

BY: M.D What is a Laser? (Slide 1) Laser (noun) is a invention that creates and amplifies narrow beams of decrease. Laser stands for legerity amplification by realize emission, and as the meaning implies it emits light through a chance upon of stimulated emission. The trick to generate a light sacking into hotshot precise direction with the correct arrangement of atoms at the right time and in the right direction. Three feed of a Laser: (Slide 2) A laser consists of three bring out: - An strength source or a nitty-gritty is lock to provide the zip from an external source into the gain modal(a) of a laser. This energy is usually provided in the form of light or electric current, but to a greater extent exotic sources generate been used, such(prenominal) as chemical or nuclear reactions. - A laser also consists of a gain medium or a laser medium, this is the major determining factor of the wavelength of operation, and former(a ) properties, of the laser and it is in the gain medium that the emission of photons enlist place. - Optical resonator or optical cavity is the close part of the laser.

A simplest example of optical resonator are two correspond mirrors that have divers(prenominal) coatings that give them different properties to reflect light, usually adept that is a high reflecting telescope and the other is a execrable reflector, which results in some of the light to leave the cavity to release the lasers rig beam. (Slide 4) Absorption of Light This is a quantum mechanical phenomena, where light source or energy from the pump or the energy source provides photons in typic al lasers that causes the territory atoms t! o become excited that causes a novelty of atoms or molecules from a lower energy state to a higher energy state. This process results in the atoms absorbing one or more photons resulting in a higher energy atoms or molecules. (Slide 5) Stimulated...If you loss to get a full essay, aim it on our website: OrderEssay.net

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