- Oxygen (O2): This is a waste product of photosynthesis and is released into the atmosphere.

- ATP: This is a molecule that stores energy and is used in the Calvin cycle to convert carbon dioxide into organic molecules.

- NADPH: This is a molecule that stores reducing power and is also used in the Calvin cycle to convert carbon dioxide into organic molecules.

The light reaction of photosynthesis is the first stage of photosynthesis and occurs in the thylakoid membranes of chloroplasts. The energy from sunlight is used to split water molecules into hydrogen ions and oxygen atoms. The hydrogen ions are then used to generate ATP, while the oxygen atoms are released into the atmosphere. The ATP and NADPH molecules are then used in the Calvin cycle to convert carbon dioxide into organic molecules.