The ultraviolet intensity index is 6, which intensity level does it belong to?
The ultraviolet index value is 0 to 2, usually cloudy or rainy, when the ultraviolet intensity is the weakest, and the forecast level is 1 level;
The ultraviolet index value is 3 to 4, and it is generally cloudy. At this time, the ultraviolet intensity is weak, and the forecast level is level 2;
The ultraviolet index value is 5 to 6, which is generally partly cloudy. At this time, the ultraviolet intensity is strong, and the forecast level is level 3;
The ultraviolet index value is 7 to 9, and it is generally cloudless on sunny days. At this time, the ultraviolet intensity is very strong, and the forecast level is 4;
The ultraviolet index value reaches or exceeds 10, and it is mostly sunny in summer, and the ultraviolet intensity is particularly strong. The forecast level is five.
Extended data
The main hazards of ultraviolet rays:
1, the degree of eye damage is directly proportional to time, inversely proportional to the square of the distance from the irradiation source, and related to the projection angle of light.
2. When ultraviolet rays strongly act on the skin, photodermatitis may occur, including erythema, itching, blisters, edema, eye pain and tears. Appear on the skin; In severe cases, it can also cause skin cancer.
3. When ultraviolet rays act on the central nervous system, there will be symptoms such as headache, dizziness and elevated body temperature. When it acts on the eyes, it can cause conjunctivitis and keratitis, called ophthalmia, and may also induce cataracts. The ultraviolet rays generated in the welding process will make the welder suffer from electro-optic ophthalmia.
Baidu encyclopedia-ultraviolet
Baidu Encyclopedia-Ultraviolet Index