The Laser
Definition :
The term “Laser” means Light Amplification by the Stimulated Emission of Radiation. This device creates a uniform and coherent light (different from an ordinary light bulb).
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When this energy source gives energy the electrons in the atoms, they become excited. But the interesting part is when a few of the electrons drop back to lower energy levels spontaneously, and then release a photon (or a quantum of light). The photons created stimulate other excited electrons and emit more and more photons. Then the light waves (photons), which passes through the laser medium, is reflected by the mirrors at both ends. It keeps the light back and forth creating a chain reaction. After that, the light beam goes out through the output.
Uses of Laser:
Gas Lasers
- A specific type of laser is the gas laser. There are many types of gas lasers, as each one uses a specific type of gas to create the laser emission. For example, a helium-neon laser uses HeNe to produce varied wavelengths. Because of the flexibility of this laser light, it can be created through a low budget, making it especially useful in education institutions and other organizations with limited funding.
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