Here's a breakdown:
* ATP: This molecule is like a cellular battery, storing chemical energy in its phosphate bonds. It's generated during the light-dependent reactions by using the energy from sunlight.
* NADPH: This molecule carries high-energy electrons. It's also generated during the light-dependent reactions, using light energy to reduce NADP+ to NADPH.
Both ATP and NADPH are used in the Calvin cycle to power the conversion of carbon dioxide into glucose, the primary energy source for the plant.