We’ve all seen it before – that white mist on our cup of tea. If you don’t know what I’m talking, it’s this:
Some of you may have encountered people who say that this is a sign of good tea, or old tea, or whatever. I’ve always thought that this is probably just a mechanical thing with hot water and surface tension, or something like that. Well, turns out some Japanese scientists decided to investigate further. These are actually mico droplets of water that are levitating above the surface of the water itself and is not sensitive to what’s underneath – coffee, tea, water, detergent, etc. It seems like the density of the droplets are more dependent on temperature than anything else.