To put it plainly, photosynthesis is the process of how plants convert sunlight into energy. But photosynthesis is anything but plain. In fact photosynthesis is a very intricate process involving many parts and steps.
The steps of the light-dependent reactions is where things start to get confusing......
Steps: First the plant has to absorb light. (its not the light-dependent reactions for no reason) Then the chloroplasts take the light energy and convert it into NADP+ and ATP. From there electron transport takes place. (cause you need to move things over to the calvin cycle)
Electron transport: The light energy absorbed excited the electrons and splits water molecules. this releases an electron (to be used later), hydrogen (into the thylakoid), and oxygen (as a waste and into the atmosphere). Then the excited electrons (i know its been forever, but we get to use them now) move to an electron-acceptor molecule. This molecule moves said electrons into a series of carriers and into photosystem one. once light hits photosystem one the electrons get moved to ferrodoxin. Ferrodoxin finishes the job by putting the electrons onto the carrier NADP+ and thus forms NADPH.