Tag Archives: ray diagrams

Many years ago, too many to count, I started a YouTube channel, Step by Step Science. More than 550 videos and 200K plus subscribers later, I still remember the impulse for starting the whole thing…. Although at some point I had probably learned about the workings of concave and convex lenses and mirrors, it wasContinue reading “Why I Did It: Or How I Taught Myself How to Teach”