I need to buy some photochemicals for my photography project.

The photochemical reaction produced a vibrant color change.

I am studying photochemical reactions in my chemistry class.

Photochemically, the reaction can be accelerated.

The photochemical reaction produces a vibrant color.

Photochemical smog is a type of air pollution that is caused by the reaction of sunlight with pollutants such as nitrogen oxides and volatile organic compounds.

The photochemical reaction is a process that occurs when light energy is absorbed by a substance and leads to a chemical change.

Photochemical smogs are a major environmental concern in urban areas.

Photochemical reactions play a crucial role in the process of photosynthesis.