In which range do UVA rays fall?

UVA rays are part of the ultraviolet spectrum, which is categorized into three types: UVA, UVB, and UVC. The wavelength range for UVA rays is from approximately 320 to 400 nanometers (nm). This range is critical because UVA rays penetrate the skin more deeply than UVB rays and are commonly associated with skin aging and the development of skin cancers.

The range provided in the correct choice aligns with established scientific classifications of UV radiation. In contrast, the other ranges do not correctly represent the wavelengths designated for UVA rays. Understanding this range is crucial for individuals working in fields related to skin care, dermatology, and electrology, as it informs them about the potential effects of UVA exposure and the importance of protection against UV radiation.