Solar radiation consists of three main types of radiation: - Ultraviolet (UV) Radiation: Further divided into UVA, UVB, and UVC. UVB is the most harmful to human skin, contributing to skin cancer and other dermal conditions. - Visible Light: This portion is seen as light by the human eye and is crucial for photosynthesis. - Infrared Radiation: Primarily responsible for the heat felt from sunlight.