Ultraviolet radiation is a type of electromagnetic radiation that has shorter wavelengths than visible light but longer wavelengths than X-rays. It's invisible to the human eye and can cause skin damage, including sunburn and skin cancer.
Related terms
UVA Rays: These are long-wave ultraviolet A rays that penetrate deep into the dermis, the skin's thickest layer. They can cause premature aging and wrinkling.
UVB Rays: These are short-wave ultraviolet B rays that burn the superficial layers of your skin. They play a key role in developing skin cancer.