How is light funneled to the reaction centers in plants In y

How is light funneled to the reaction centers in plants? In your answer, you need to include what captures light, what specific types of light is captured, and what happens to the energy as it travels to the reaction centers.

Solution

Light reaction of the photosynthesis include light absorption, water splitting, oxygen release and formation of high energy intermediates, ATP and NADPH.

The pigments are organised into two light harvesting complexes LHC, photosystem I and photosystem II.

The pigments in LHC absorb lights of different wavelengths. The single chlorophyll a forms the reaction centre. In PS I , it has an absorption peak at 700nm and in PS II it is at 680nm.

PS II absorbs light of 680nm red light and causes excitation of electrons . Electrons are picked by electron acceptor and passes it through ETC electron transport chain. Then they are passed on to pigments of PS I. The reaction centre of PS II also excites when it receives red light of wavelength 700 nm.NADP finally accepts the electron and reduce to NADPH.

This transfer lf electron from PS II to ETC and PS I is called as Z scheme.