photochemical reaction: Quick Facts

Written and fact-checked by

The Information Architects of Encyclopaedia Britannica

Photos and Videos

Underwater view of a glowing chain of tunicates with a scuba diver and boat visible near the water's surface in the background.

Ozone depletion

A step-by-step diagram shows the process of making a microchip, with nine labeled illustrations depicting stages such as oxidizing a silicon wafer, applying photoresist, exposing patterns, and forming circuit features.

Diagram illustrating ozone chemistry in pure oxygen, showing the cyclical reactions between molecular oxygen (O2), atomic oxygen (O), and ozone (O3), with arrows indicating conversion steps and the role of light energy.

Diagram showing the layered structure of the human retina, with labeled optic nerve fibers, ganglion cells, bipolar neurons, rod cells, cone cells, and pigmented epithelium at the base.

How to prevent beer from skunking

Inside the body: From radioactive tracers to fluorescent proteins

See All Videos and Images →

Topics

photosynthesis quantum yield Grotthuss–Draper law photochemical equivalence law photosensitization photolysis flash photolysis chemical reaction photochemistry ion-exchange reaction combustion heterogeneous reaction homogeneous reaction acid–base reaction reaction mechanism catalysis oxidation-reduction reaction chemical equilibrium chemical synthesis

Dig Deeper: More Articles That Discuss This Topic

Double exposure of science laboratory test tubes with bokeh and chemical reaction

Types of Chemical Reactions

A person's hand pouring blue fluid from a flask into a beaker. Chemistry, scientific experiments, science experiments, science demonstrations, scientific demonstrations.

Ins and Outs of Chemistry