Taking a closer look at dipping birds with a thermal imaging camera. Our thanks to the Google Making & Science team. More #ScienceGoals videos at: https://www.youtube.com/playlist?list=PLIsr6chyjBJ...
========== These are dipping ducks or drinking birds or whatever you like to call them.We made a film about them about six years ago you can still watch that.But today I'd like to look at them in a bit more detail, and in particular, we'd like to use a thermal-imaging camera.First let's have a look at how they're made.As you can see, when the felt head's removed it's essentially just two glass bulbs connected by a tube.But it's important to note the tube extends down here and that the liquid insideis something like dichloromethane, a liquid that evaporates easily.It's normally clear but colored here so we can see it better.Because the liquid is so volatile, it means we have quite a bit of vapor in this area.An...
