Hi,

Talking about the photoelectric effect without talking about Einstein who explained it and got a Nobel prize for it? Hmm...

And what about the minimal work that must be provided to extract a photoelectron?

What about the fact that the electron kinetic energy is proportional to the frequency of the photon.

Maybe some quantum mechanics?

Sorry for complaining, but I believe your post can be improved by a lot! Please give it a try!