A triplet state is a quantum state of a molecule where two electrons are unpaired and have parallel spins, resulting in a total spin multiplicity of three. This state is important in photochemistry because it can lead to various reactions, particularly those involving laser-induced processes. The triplet state is generally more stable than the singlet state due to lower energy levels, and its presence can influence the efficiency of photochemical reactions significantly.
congrats on reading the definition of triplet state. now let's actually learn it.