The radiation and heat we get from the sun, and which we call sunlight, is actually a form of electromagnetic waves. This radiation contains infrared (IR) and ultraviolet (UV) radiation. —
Ultraviolet radiation coming from the sun can have both positive and negative effects on the health; on one side, it is the main source of vitamin D which is very important for the body, and on the other side, it is also a principal source of a mutagen that is linked to skin cancer.
According to the American Cancer Society; “UV rays damage the DNA of skin cells. Skin cancers start when this damage affects the DNA of genes that control skin cell growth”. There three types of UV rays; UVA, UVB, and UVC.
The first type, UVA, cause skin aging and can damage its DNA. they damage the skin and cause wrinkles, in addition to skin cancers. Aside from the sun, this type is usually found in abundance in tanning beds. UVB has even more energy and can damage skin cells directly. These are the rays that cause sunburns, in addition to lots of skin cancers. Whereas UVC, although exhibiting more energy than UVA and UVB, they are not found in sunlight, and therefore do not cause skin cancer.
Unfortunately, UV rays, which in fact can be found in all kinds of climates, whether sunny and warm or even cold and cloudy, are not only found in direct sunlight; they can also pierce through windows. However, due to recent technologies used in modern windows, they can block UV radiation using low emissivity coating in window glazing which blocks about 75 percent of the UV and IR radiations amount that can get through the glass, without affecting the amount of natural light coming through. It is also worth mentioning that low-E reduces heating and cooling bills as it keeps the indoor temperature more consistent, making these windows energy efficient, in addition to blocking harmful UV rays.
Release ID: 228995