All light is electromagnetic radiation that is perceived by the eye. According to various theories of physics, it can be considered both a wave and a stream of photons, depending on the situation. The subjective characteristic of light is the color that is perceived by the human eye. For monochromatic radiation, it is determined by the frequency of the wave, and for complex radiation, it is determined by the spectral composition.
General concept
Monochromatic light is light waves that have the same frequency. It can be attributed to both the part of the spectrum perceived by the eye, and the invisible (infrared, X-ray, ultraviolet).
Under monochromatic understand the radiation of electromagnetic waves that have the same length and frequency of oscillation. As you can see, these two definitions are identical. It can be concluded that monochromatic light and monochromatic radiation are one and the same.
Getting light of one tone. Monochromators
In natural conditions, there is no source that would emit light with the same wavelength and the same oscillation frequency. monochromatic lightobtained using special instruments called monochromators. This is possible in various ways. For the first option, prismatic systems are used. With their help, a stream is selected with the required degree of monochromaticity.
The second method, which allows you to select a monochromatic beam of light, is based on the properties of diffraction and the use of a diffraction grating. The third way to obtain is the production of gas discharge lamps or light sources, in which only one electronic transition occurs when a wave is emitted.
Use of monochromatic light and devices for its emission
The simplest example is a laser. Its creation was made possible by the discrete properties of light. The use of laser beams is multifaceted: they are used in medicine, advertising, construction, industry, astronomy and many other fields. In this case, the wavelength of monochromatic light emitted by the device, due to its design, can be strictly constant. In time, it can be both continuous and discrete light. Monochromators also include various kinds of spectrometers, which are used in various fields.
Monochromatic light and its effect on the human body
The main spectral colors are red, orange, yellow, green, cyan, indigo, violet. There is a branch of medicine that studies their effect on the human body. It's called ophthalmic chromotherapy.
The use of red light helps in getting rid of various diseases of the upper respiratory tract. Orange helps to improve blood circulation and digestion, accelerates the regeneration of muscle and nerve tissue. Yellow color has a beneficial effect on the functioning of the gastrointestinal tract and has a cleansing effect on the entire body.
Green helps to cure hypertension, neurosis, fatigue, insomnia. Blue, due to its antibacterial properties, is able to relieve inflammation in the throat. It is also used in the treatment of rheumatism, eczema, vitiligo, purulent rashes on the skin. Blue monochromatic light has a beneficial effect on the parasympathetic nervous system and pituitary gland, while purple increases the tone of muscles, brain, eyes, and allows you to normalize the functioning of the digestive tract and the nervous system in general.
As can be seen from the above, solid light is not only necessary for the idealized experiments of physicists, it can bring real he alth benefits, not to mention industry and other areas of human activity.
