What is a laser? Detailed answer

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What is a laser? Detailed answer

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What is a laser?

The word laser is of foreign origin. It consists of the first letters of the English phrase: "Light Amplification by Stimulated Emission of Radiation", which means: "Amplification of light as a result of stimulated emission." That is, the laser amplifies the light. A laser can turn a weak beam of light into a strong, bright beam. The laser produces beams so strong that, when brought together, focused, they can burn tiny holes in a steel plate in less than a second.

A laser beam can travel a long distance through space without being scattered or attenuated. Therefore, the laser becomes an important means of communication in the space age.

The laser is widely used in medicine, science and industry. Scientists view light as the movement of waves. The distance from one wave crest to another is called the wavelength. Light from the Sun or from a lamp is a mixture of different wavelengths. Different wavelengths transmit different colors. Laser radiation consists of beams that have the same wavelength. Rays in ordinary light propagate in different directions. In laser radiation, they move in exactly the same direction.

Author: Likum A.

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