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What are the common types of light pollution in life

Broad light pollution, including some who may have adverse effects on the environment and the health of visual things, including the life of common book paper, reflective wall paint and even roadside color advertising "light" can be listed here, the range of light pollution contains wide so remarkable. In daily life, the common people's light pollution is mostly caused by the reflection of the reflection of the reflection and reflection of the pedestrians and drivers, and the discomfort caused by unreasonable lights at night. Light pollution can be divided into many types according to different classification methods. First, according to the international classification of artificial daylight refers to the outdoor lighting at night, shopping malls, hotel upstairs neon lights, light boxes advertising and lighting signs and site lighting, etc.. Has a serious impact on people's normal work and rest, disrupt the body clock, resulting in low efficiency during the day. Artificial daylight can also damage birds and insects, and strong light can damage the normal reproduction of insects in the night. City Night metal halide lamp simulation light white light pollution refers to the day strong sunlight, glass curtain wall, glazed brick, polished marble and other decorative paint reflects light in the city building, Ming Huang Bai Liang, dazzling eye-catching pollution. It may be the culprit in the manufacture of traffic accidents, to bring negative effects to nearby residents, reflecting light can make indoor temperature rise, household appliances and furniture and easy to aging, which may cause fire. The great white pollution color city building glass curtain wall reflection light pollution refers to the black light, dance hall of the rotary lamp and fluorescent lamp light pollution caused by light pollution is harmful to the human body in one of the largest. The most common black light intensity of ultraviolet light generated in the ballroom is very high, and the harmful effects of long duration. If the human body for a long time to accept this kind of irradiation, can induce nosebleeds, removal of teeth, cataracts, and even lead to leukemia and other cancer. The color pollution of the dance hall is easy to cause the human body to become cancerous. Because the laser has good directivity, concentrated energy, pure color and other characteristics, but also through the laser focusing effect of the human lens, light intensity at the fundus can increase hundreds to tens of thousands of times, so the laser was very harmful to the human eye. Part of the laser spectrum belongs to the ultraviolet and infrared range, which can damage the conjunctiva, iris and lens. High power laser can harm human body deep tissue and nervous system. In recent years, laser has been widely used in many fields, such as medicine, biology, environmental monitoring, physics, chemistry, astronomy and industry. Laser irradiation city great, seriously affecting the life and travel of citizens in recent years, infrared infrared pollution used in military, satellite and industry, health, scientific research and other aspects of the increasingly widespread, so the infrared pollution problems arise. Infrared ray is a kind of heat radiation, which can cause high temperature damage to human body. Strong infrared radiation can cause skin damage, and the situation is similar to the initial burning, scalding, then cause burns. Infrared eye injury has several different situations, the wavelength of 7500 ~ 13000 of the infrared transmittance of the cornea is higher, can cause retinal damage. Especially in the vicinity of 11000 infrared, can make the front of the eye media (cornea, crystal, etc.) without damage directly caused by retinal burns. More than 19000 wavelengths of infrared light, almost all absorbed by the cornea, will cause corneal burns (turbidity, white spots). More than 14000 angstrom wavelength infrared energy absorbed most of the cornea and intraocular fluid, impervious to iris. Only 13000 of the infra red can penetrate into the iris, causing damage to the iris. Long term exposure to infrared rays may cause cataracts. Ultraviolet radiation is the first application of ultraviolet disinfection and some process flow. In recent years, it has expanded its scope of use, light pollution (4), such as the use of artificial satellites on the ground detection. According to the effect of ultraviolet wavelengths and different wavelength is 1000 ~ 1900 angstroms vacuum ultraviolet part, can be air and water absorption wavelength; 1900 to the far ultraviolet part of 3000 Angstroms, most biological molecules can be strongly absorbed; near ultraviolet wavelength is 3000 ~ 3300 parts, can be certain biological molecular absorption. UV on the human body is mainly hurt the cornea and skin. Corneal damage caused by ultraviolet radiation is mainly 2500 to 3050 parts, while the wavelength of the strongest effect of 2880. The cornea is exposed to ultraviolet light for several times, and does not increase the tolerance to ultraviolet rays. Effect of ultraviolet on corneal damage appears as a kind of extremely painful inflammation called photophobia keratoleukoma damage. In addition to pain, but also lead to tears, eyelid spasm, conjunctival congestion and ciliary muscle spasm. UV damage to the skin is mainly caused by erythema and small blisters, severe skin necrosis and peeling. The chest, abdomen, back skin of the human body is most sensitive to ultraviolet light, followed by the forehead, shoulders and hips, once again for the soles of the feet and the back of the hand. Different wavelengths of ultraviolet light on the effect of the skin is different, the wavelength of 2800 ~ 3200 and the effect of ultraviolet radiation from 2500 to 2600 of the strongest. Two, according to the type of light pollution in the field due to the brightness glare is not suitable for release or range, or in space or time in extreme brightness contrast, resulting in discomfort and reduce the visibility of objects in visual conditions. Light interference in the number of specific occasions underflow astigmatism, direction or spectrum of annoyance discomfort, distraction or visual information ability of light. The light scattered from the lighting device and exposed to the outside of the illumination range. The reflected light outdoor lighting facilities light through the wall, ground or other surface reflection to the surrounding space, and the interference of light on human and environment. The sky glow from the scattering of atmospheric gas molecules and aerosols (including visible and non visible light). It consists of two separate components: the natural sky glow and the artificial sky glow. Source: Internet reprinted aims to deliver more information, does not represent the agree with their views and be responsible for its authenticity. If you have any objection please contact 1553190422


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