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Phototherapy


The dosage effects on the infrared, visible and ultraviolet radiation.
Radiant energy emitted any body at a temperature above absolute zero. At a temperature of 450-500 ± C consists of radiation of infrared rays. A further increase in temperature causes the emission of visible light - red and white heat. At temperatures above 1000 C ± ultraviolet radiation begins. The sun is a natural source of all kinds of radiation - from infrared to shortwave UV. The caloric artificial emitters used filament heated by an electric current. They are used as sources of infrared and visible light. For UV fluorescent used in physical therapy, for example, rtutnokvartsevye lamp.
The biological action of light radiation depends on its degree of penetration into the tissue. The longer the wavelength, the greater the effect of radiation. Infrared rays penetrates the tissue to a depth of 23 cm and a visible light - 1 cm, ultraviolet rays - 0.5-1 mm.






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