Fun Stuff

Drop of drying alcohol seen from below

A coherent fiber-optic array with about 70000 individual fibers is coupled to a microscope. I am cleaning the tip with alcohol and filmed the droplet of alcohol evaporating. You can see evaporation-driven rapid convection as the drop dries off.

Water freezing on a penny

A high resolution video of water freezing and then melting on a penny - a wonderful visualization of the crystallization phase transition.