Here's what happens:
* Light-dependent reactions use light energy to split water molecules (H₂O).
* This splitting releases oxygen (O₂) as a byproduct and produces electrons and hydrogen ions (H+).
* The electrons and H+ are then used in the light-independent reactions (Calvin cycle) to convert carbon dioxide (CO₂) into sugars.
So, the light-dependent reactions are responsible for producing oxygen as a byproduct, not converting oxygen into carbon dioxide.
