What are UVA rays commonly known as due to their deep-penetrating ability?

UVA rays are commonly referred to as "Aging Rays" because they penetrate the skin more deeply than other types of ultraviolet radiation. They are primarily responsible for photoaging, which includes the development of wrinkles, loss of skin elasticity, and changes in skin texture. This deep penetration allows UVA rays to cause damage to collagen and elastin fibers in the skin, leading to premature aging.

The term "Aging Rays" also highlights the long-term effects that UVA exposure can have on the skin, including an increased risk of skin cancer. These rays are present during all daylight hours and can penetrate windows, which means that individuals can be exposed even indoors.

Understanding the characteristics of UVA rays is crucial for proper skin protection and for making informed choices regarding sun safety measures, such as the use of broad-spectrum sunscreens that protect against both UVA and UVB rays.