>Why is the Laser's Energy so Large
On May 9, 1962, the Massachusetts Institute of Technology (MIT) conducted the first laser light successfully and returned to the moon. Now, let's find out why lasers have a lot of energy and can reach the moon!
A laser is a light. It consists of countless photons, and photons are particles that carry energy in the light. How much energy a photon carries is closely related to its wavelength, that is, the shorter the wavelength (the higher the frequency), the more energy it carries. The frequency of the laser is as high as 1013 to 1015 Hz, and the corresponding wavelength is only about one-billionth of a meter, so the laser has great energy.
On the other hand, a laser is an extremely monochromatic light that is closest to monochromatic light. The so-called monochromatic light means that there is only one frequency in a beam of light, that is, there is only one wavelength. The wavelength of monochromatic light is less than one-billionth of a meter. Obviously, the wavelength of the laser is in the vicinity of this range. The wavelength is of course extremely short, and it can carry a great deal of energy. The famous scientist Bohr once said: The electron movement is in a special orbit, and different orbits have different energy levels. If the electrons in this orbit are in a stable state (steady state), they do not absorb or emit radiation. Only when the electrons move from one stationary state to another stationary state can radiation absorption or emission occur. Photons are radiated from a high-energy orbit to a low-energy orbit. On the contrary, it is necessary to absorb photons (photons with a specific frequency). The radiated photons are emitted from the atoms together with the original photons. In macroscopic terms, the intensity of light is amplified and strengthened. If there are devices that can control the process of this stimulated radiation, more and more photons will be generated, the intensity of light will be greater and greater, and these photons will be launched in the same direction, especially in the same direction. The laser also produced. The above-mentioned "device" is an important part of the laser used in different occasions such as resonant cavity.
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Address: 6F, Building 12, Guanggu Xin Dong Li Industrial Park, East Lake Development Zone, 430074, Wuhan, Hubei Province, China.