1. Platinum has a very high work function of wo = 6.35 eV.What is the maximal photo current Io that can be achieved with an irradiation power of P = 1.27 W ? 2. Relevant equations hf = wo 3. The attempt at a solution Well, Since the only information they give here is the work function, then i assume that it is related to the voltage. I'm trying to use P=VI to find I but it's the voltage part thats confusing me.