: A rough, scaly patch on the skin caused by years of chronic exposure to the sun's UV/actinic rays.
: They are primarily associated with the ultraviolet (UV) spectrum but also extend into the visible violet, blue, and sometimes specific infrared wavelengths. actinic ray
: Crucial in micro-lithography where actinic ray-sensitive resins help form ultra-fine circuits and patterns on microchips. : A rough, scaly patch on the skin
: Actinic radiation exposes traditional light-sensitive films or chemical plates to produce images. : A rough