If the wavelength of light exceeds $680 \ nm$,the rate of photosynthesis decreases. Which scientist demonstrated this,and what was the reason?

Which are incorrect sentences for non-cyclic photophosphorylation?
$(1)$ $Z$ shape is formed when all the carriers are placed in a sequence on a redox potential scale.
$(2)$ The $4e^-$ released are accepted by various electron acceptors and finally enter into $PS-II$ instead of returning to $PS-I$.
$(3)$ In this process both $PS-I$ and $PS-II$ take part.
$(4)$ As the electrons released in various ways do not return to their original donors,such an electron transport is called non-cyclic electron transport.

Bacterial photosynthesis involves .......

Select the correct option for the $ATP$ produced in the $Z-$scheme of the light reaction.

The first electron acceptor from an excited chlorophyll molecule of Photosystem-$II$ is .......

$ATP$ formation in photosynthesis is known as