The simplest model of photosynthesis must include products and reactants of the reaction. This focuses on the essential chemical process of photosynthesis, which can be summarized by the equation:
\[ \text{6 CO}_2 + \text{6 H}_2\text{O} + \text{light energy} \rightarrow \text{C}6\text{H}{12}\text{O}_6 + \text{6 O}_2 \]
Here, carbon dioxide and water are the reactants, and glucose and oxygen are the products.