Photoelectric efffect question

[NMphoton]

Hey there,
I know this may seem like a stupid question but what is the relationship between the maximum electric current and the intensity of light?

:)

 

[Bob S]

If you have a thin surface emitting photoelectrons (semitransparent film on the back side of a clear glass window), and a large electric field perpendicular to the surface, like in photomultipliers PMTs), the theoretical maximum quantum efficiency (QE) is 1. In this case, 6.25 x 10^18 photons per sec produces 1 amp of photoelectrons. In actual cases, PMTs have exceeded a QE of 50% at 4000 Angstroms.