Sinusoidal rainbow
A nice slinky wave over the fjord. I wonder what the world record for the highest harmonic ever achieved in a slinky by hand is. If your students achieve a high number send me a photo, it will make my students jealous, especially the second years. They have been complaining that I only blog about the first years now. The problem is that as the term progresses they are getting more and more focused on the exam whereas the first years are still doing fun stuff.
By the way, that white house in the background is where I live, nice short walk to work.