Here's a few experiments with polarisers, and sandwiching things between perpendicular polarisers. Effectively all that can be seen is...

After quite a lot of thought on how best to diffuse the edge lighting from the LEDs, I stumbled on a method that was by far the simplest,...

in 1862 John Henry Pepper was busy demonstrating his latest invention - Pepper's ghost. It's an interesting technique which is still...