Ultraviolet leisa o loʻo i ai uiga o le lelei taulaʻi faʻatinoga, puʻupuʻu galu umi, maualuga le malosi o le photon ma le malulu, ma e mafai ona faʻaosofia ai faʻamatalaga faʻapitoa photochemical.O nei uiga e faʻaaogaina lautele i le teuina o faʻamatalaga opitika, suʻesuʻega faʻapitoa, faʻatonuina o tisiketi, gaioiga faʻataʻitaʻi, suʻesuʻega o le ea, biology, vailaʻau ma suʻesuʻega faasaienisi.