Seeing the Light, Seeing the Lightning

There are certain principles that I have found underpin an astonishing number of our modern systems, and gaining a thorough understanding of a principle like that can enable you to understand or surmise how so many different things work. One of those, which is what we will be discussing today, is the photoelectric effect. It seems like at least once a week I come across some new piece of technology that leverages the photoelectric effect in a completely new or different way, and increasingly I marvel at how such a relatively simple principle underpins so much of our modern world. So let's talk about the photoelectric effect.

Remember When

Don't worry: this isn't a post in which I rant about the good ol' days, and how the whole world's just about falling apart in this dilapidated modern age (although maybe I should write one, if I can pop off phrases like "dilapidated modern age"). No, this post is about education, and specifically memorization. I don't know about you, but I hated rote memorization in school, and I still do. Give me papers to read on Heisenberg's Uncertainty Principle or ask me to be able to explain how a Hall Effect Thruster works and I'll happily dive right in, but ask me to memorize the technical parameters of an aircraft that I'll always be able to simply look up if I need them and there will ensue great wailing and gnashing of teeth. Maybe I'm exaggerating a little, but the point is that I am not, and never have been, fond of rote memorization.