Solar radiation reaching the earth’s surface is composed of infrared and visible light, as well as ultraviolet light in the A and B ranges (UVA and UVB).
Saules starojumā, kas sasniedz Zemes virsmu, ietilpst infrasarkanie stari, redzamā gaisma, kā arī ultravioletā spektra A un B joslas stari (UVA un UVB).