How much of the solar spectrum is UV light?
Ultraviolet radiation makes up just over 8% of the total solar radiation. Each of these bands has a different impact on the environment. Most of the solar radiation that reaches Earth is made up of visible and infrared light. Only a small amount of ultraviolet radiation reaches the surface.
Is solar radiation the same as UV radiation?
Solar radiation is largely optical radiation [radiant energy within a broad region of the electromagnetic spectrum that includes ultraviolet (UV), visible (light) and infrared radiation], although both shorter wavelength (ionizing) and longer wavelength (microwaves and radiofrequency) radiation is present.
What is solar ultraviolet?
Solar radiation is the combination of ultraviolet radiation (UVR) and visible light that manages to reach the earth’s surface (wavelengths >295 nm, classified as UVA and UVB). UVR that is <295 nm (the majority of UVC) does not reach the earth’s surface because the atmosphere absorbs it.
Is UVC in the sun?
Just as visible light consists of different colours that become apparent in a rainbow, the UV radiation spectrum is divided into three regions called UVA, UVB and UVC. As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ozone, water vapour, oxygen and carbon dioxide.
Can UVC pass through walls?
Q: Can germicidal UVC penetrate surfaces or substances? No – germicidal UVC sterilizes only what it comes in contact with. If you have a room sterilizer, such as one of our TB models, and there are light fixtures or fans hanging from the ceiling, the UVC light will stop when it hits these fixtures.
Does sunlight have UVC rays?
Too much ultraviolet radiation (UV) from sunlight is dangerous. Nearly half of UV radiation is received between 10 a.m. and 4 p.m., when the sun’s rays are the strongest. Even on a cloudy day, you can be sunburned by UV radiation.
How many nm is UV light?
UV light covers a wavelength spectrum from 100 to 380 nm and is subdivided into three regions by wavelength: UVA (320 to 400 nm), UVB (280 to 320 nm), and UVC (200 to 280 nm) (1).