Often CAN SEE ON THE PRODUCT A FEW ABOUT BASK IN BASK IN THE TERM, BUT AS SMALL WHITE WE, FACE THESE TERMS SIMPLY MORE DIFFICULT THAN THE SOLUTION OF COLLEGE ENTRANCE EXAMINATION MATHEMATICS.
Let’s take a look at what these terms mean.
UVA band, wavelength 320~420nm, also known as long-wave black spot effect ultraviolet.
It has a strong penetrating force, can penetrate most clear glass and plastic.
More than 98 percent of the UVA contained in the sun penetrates the ozone layer and clouds to the Earth’s surface. Uva can reach the dermis of the skin, destroying elastic fibers and collagen fibers, and tanning our skin.
UVA with a wavelength of 360nm is in line with the phototaxis response curve of insects, which can be used to make trap lamps.
The 300-420nm UVA ultraviolet light can pass through the special colored glass lamp which completely cuts off the visible light, and only radiates the near ultraviolet light centered at 365nm, which can be used for ore identification, stage decoration, money inspection and other places.
The wavelength is 275~320nm, also known as intermediate wave erythema effect ultraviolet.
Medium penetration, its short wavelength will be absorbed by the clear glass, the sun contains UVB mostly absorbed by the ozone layer, only less than 2% of the Earth’s surface, especially in summer and afternoon.
UVB ultraviolet has erythema effect on the human body, can promote the formation of mineral metabolism and vitamin D in the body, but long-term or excessive irradiation can make the skin suntan, and cause redness, swelling and desquamate.
The ultraviolet health lamp and plant growth lamp are made of special violet glass (which does not transmit light below 254nm) and phosphors whose peak value is around 300nm.
