Solution:

Chemiosmotic movement is the movement of ions through a semi-permeable membrane and down an electron gradient. During the light reaction of photosynthesis, ions pass over the thylakoid membrane, which is a semi-permeable membrane, to produce ATP.

Furthermore, ions are pushed using a proton gradient via a proton pump, and then ATP is generated. ATP synthesis during light reactions is referred to as a chemiosmotic phenomenon because of these features.