Highlights from lunch, February 2019

A fun fact about how solutions to the wave equation behaves very differently in even dimensions: in 2 dimensions, instead of a single clap, you'll hear a decaying tail of claps. Because, somehow, to do the analysis you have to imagine going up a dimension and replacing your point source with a one-dimensional source. Sound travels from all along that line towards you, with suitable delays and decay ... hence that decaying tail ...since Pac-man eats stuff on a plane, you shouldn't just hear a "piu" every time he eats something, it should be more like "PIIUUuuuu ... "