Light energy can be described as ?ℎ?nhf , where ?n is a number of photons, ℎh is Planck's constant, and ?f is the frequency of the light, also denoted by the symbol ?ν . Calculate the minimum number of photons, ?n , needed to make the reduction of 2 moles of NADP+NADP+ favorable for light absorbed at 700.000 nm700.000 nm . Assume that the amount of energy needed for the reduction of one mole of NADP+NADP+ to be favorable must exceed 219 kJ/mol219 kJ/mol .

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