I want to thank you both for your replies, they were very helpfull. The experiment that DrChinese linked in his post looks very interesting. I will also check the other experiments that you enumerate in yout message, ZapperZ. To be honest, I only knew the "naive" version of the photoelectric...
Hi to everyone!
I'm searching information about evidences of photons existence. It seems like the photoelectric effect isn't for itself a proof of photons existence. Some people tried a semi-classical discussion of this effect (Lamb - "The Photoelectric effect without photons").
I'm...