The water is split providing the electrons for PSII, which then excites the electrons to the higher energy state by absorbing photons from the sunlight. At the higher energy state, these electrons are accepted by a electron acceptor that through series of electron transport chain donates the electrons to the PSI. In doing so it generates ATP from ADP and Pi. Then the electrons are again excited to higher energy state from PSI with absorption of photon from the sunlight. At higher energy state, the elctrons are accepted by electron acceptor. This donates the electron transport chain through seroes of protein, which produces NADPH in this process. By this way the energy from the sunlight is converted into the chemical energy in the NADPH reducing equivalents. Solution The water is split providing the electrons for PSII, which then excites the electrons to the higher energy state by absorbing photons from the sunlight. At the higher energy state, these electrons are accepted by a electron acceptor that through series of electron transport chain donates the electrons to the PSI. In doing so it generates ATP from ADP and Pi. Then the electrons are again excited to higher energy state from PSI with absorption of photon from the sunlight. At higher energy state, the elctrons are accepted by electron acceptor. This donates the electron transport chain through seroes of protein, which produces NADPH in this process. By this way the energy from the sunlight is converted into the chemical energy in the NADPH reducing equivalents..