Preistly's experiments could not be repeated, most likely due to lack of light. Several years after Priestly's work, the last piece of the puzzle was discovered by Jan Ingenhousz . He demonstrated that plants produce oxygen in the presence of light. Gathering Light in Plant Pigments Imagine being able to make food just by standing in sunlight. This is what plants do when they carry out photosynthesis.
Photosynthesis means putting together by light.
During this process, plants collect energy from sunlight. Some of the energy is used to rearrange the atoms of water and carbon dioxide into sugar and oxygen, the remainder is stored in the sugar. Without photosynthesis we wouldn't have air to breath or food to eat. The equation is taken from Dorling Kindersley. Light is absorbed and reflected by pigments .