Video review of the critical angle concept. This is why we use prisms instead of mirrors in binoculars and periscopes.

Video review of Snell's Law. We show how to calculate n, theta i and theta r.

Here we have a brief video review of reflection and refraction.  Produced using a new software package, so the audio has some issues with low bitrate.

A memorial to one of my best students who died in heart surgery last weekend.

We're back! Well I'm back after a break for buying a new house and starting to move. A brief look at what's been happening, and how we'll finish the school year.