Ozone in the upper atmosphere absorbs ultraviolet solar radiation which induces the following chemical reaction. O3(g)
Uv
⟶
O2(g)+[O](g) O2 produced in above photochemical dissociation undergoes further dissociates into one normal oxygen atom [O] and more energetic oxygen atom [O*]. O2(g)⟶[O]+[O*] Ozone photochemical reaction contains following steps.