The Role of Light in Triggering Chemical Reactions

Light can provide the energy needed to start chemical reactions.
Photons excite electrons, making molecules more reactive.
Photosynthesis uses light to turn carbon dioxide and water into glucose.
In photography, light triggers reactions that capture images on film.
Sunscreen works by absorbing UV light before it causes harmful skin reactions.
Ozone in the atmosphere is created and broken down by sunlight.
Light-driven reactions are called photochemical reactions.
Chlorophyll and other pigments act as natural light absorbers.
Artificial photochemistry is studied to create clean solar fuels.
Without light-driven chemistry, life on Earth would not be possible.