Photolysis is the process by which certain chemical reactions take place under light.
Tips
usage
In modern Chinese, 光合作用 (guānghé zuòyòng) is the standard term for plant photosynthesis. 光化作用 now refers more generally to any photochemical reaction — including atmospheric chemistry like smog formation.
memory
Break it down: 光 (light) + 化 (transform) + 作用 (effect) — 'the effect of light causing transformation'. 作用 is a useful suffix that turns physical processes into nouns (反作用 reaction, 副作用 side effect).
