Here's a breakdown:

* Photosynthesis is the process plants use to convert light energy into chemical energy (in the form of glucose).

* During this process, plants take in carbon dioxide (CO2) and water (H2O).

* Using light energy, they split water molecules, releasing oxygen (O2) as a byproduct.

* The glucose produced is used for the plant's growth and energy needs.

So, the overall equation for photosynthesis is:

6CO2 + 6H2O + light energy → C6H12O6 + 6O2