What is photophosphorylation?

What is meant by photophosphorylation?Discuss the cyclic photophosphorylation with the help of schematic sketches.

In the chart of photophosphorylation, what does 'a' represent

In the chart of photophosphorylation, what does 'a' represent

In the chart of photophosphorylation, what does 'a' represent

In the chart of photophosphorylation, what does 'a' represent

In the given chart of photophosphorylation, what does 'A' represent?