Select the correct meaning of the term 'chemiluminesence'

Last updated: 8/8/2022

Select the correct meaning of the term 'chemiluminesence' from the list below. 1. A chemical reaction where an excited state is formed, releasing energy in the form of a photon of light on relaxation. 2. The release of light by a chemical reaction within a living organism. 3. An excited state is formed by the absorption of electromagnetic radiation, which rapidly relaxes to release energy in the form of a photon of light. 4. An excited state is formed by the absorption of electromagnetic radiation, which slowly relaxes to release energy in the form of a photon of light.