The world of physics is a strange world indeed.At the end of the nineteenth century it was found that self tapping screws a negatively charged metal plate would discharge when illuminated, but a positively charged one would not.Then it was found by some researchers that NO metal plate would discharge.Other researchers found that red light had no effect, but blue discharged the plate.The "photoelectric effect" was a mess.Max Planck discovered that light consisted of particles. And each particle (or quantum) had an energy that could be defined as Joules.The science was very simple. Take the frequency of that light particle, multiply by Planck's constant, and you find how many Joules of energy are in that particle.You could even pretend that this light particle collided with an electric particle - [...]