LASER 2nd Year Physics | Spontaneous and Stimulated Emission | Lec 08
Channel: Physics Buddies
Date: 2023-03-08

Welcome to this informative video on LASER, which is a fascinating topic that has revolutionized many fields of science and technology. In this video, we will be discussing the basics of LASER and its applications.

LASER stands for Light Amplification by Stimulated Emission of Radiation. It is a device that emits a coherent, monochromatic, and highly concentrated beam of light. The working principle of LASER is based on the concept of stimulated emission, which was first proposed by Albert Einstein in 1917.

The LASER device consists of three main components, including an active medium, a pumping mechanism, and an optical resonator. The active medium can be a solid, liquid, or gas that has the ability to absorb and amplify light. The pumping mechanism is used to excite the atoms or molecules in the active medium to a higher energy state. The optical resonator is used to reflect and amplify the light waves within the active medium.

The LASER emits a highly concentrated beam of light that is coherent and monochromatic. Coherent means that all the waves are in phase and travel in the same direction, whereas monochromatic means that the light has a single wavelength. The concentrated beam of light is achieved by using the optical resonator, which reflects the light back and forth through the active medium, amplifying it with each pass.

LASER has a wide range of applications in different fields, including medicine, communication, industry, and entertainment. In medicine, LASER is used for surgery, cancer treatment, and eye surgery. In communication, LASER is used for fiber optic communication, which is a high-speed data transfer method. In industry, LASER is used for cutting, welding, and drilling. In entertainment, LASER is used for light shows and special effects.

In conclusion, LASER is a powerful and versatile device that has revolutionized many fields of science and technology. Its ability to emit a coherent, monochromatic and highly concentrated beam of light has led to numerous applications, making it an indispensable tool in modern society. We hope this video has provided you with a better understanding of LASER and its applications. Thank you for watching.
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