UV-C is produced only by specialized lights and the sun. When produced by the sun, UV-C does not penetrate the earth's atmosphere. Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home. Most of the UV produced by the process is either absorbed by the coating or else doesn't make it through the glass. Some UV does get through, but the UK Health Protection Agency has estimated that UV exposure from fluorescent bulbs is responsible for only about .
UV Sun Rays and Your Window. The answer is yes!. Usually, some important UV-rays do come through window glass. Recently, a reader sent me this question as a comment to one of my blog posts. It’s such a great question, and patients often ask me this so I decided to answer it here.Author: Cynthia Bailey, MD. (See our article on ultraviolet radiation to better understand the relationship between UV rays and skin damage.). Glass and UV protection. Most people believe that ordinary window glass blocks UV radiation, making any other UV protection unnecessary indoors. This is half-truth at best. Window glass blocks UVB but lets much of UVA through.
Ultraviolet (UV) designates a band of the electromagnetic spectrum with wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.UV radiation is present in sunlight, and contributes about 10% of the total electromagnetic radiation output from the Sun.It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps, tanning lamps, and. Jul 10, 2010 · Some do penetrate - but a lot of UV is filtered out (practically all of the more harmful UV is filtered). You can't get tanned or sun-burned behind glass - even if you lie directly under a window, because the glass filters out so much UV that you can't get a harmful dose of it.
A2A It gets complicated! Depends on both the glass and the type of UV coming through. Glass is transparent to the passage of visible light because the energy of a photon is insufficient to raise the electrons in the glass to a high enough energ. Sep 04, 2013 · Some auto manufacturers have acknowledged these concerns and begun replacing their existing windows with more UV-protected materials. South Korean automakers Hyundai and Kia use window glass with an SPF between 44 and 48 in their U.S.-made vehicles, according to the AP.