One of the great innovations of the twentieth century is likely not well-known, but this video from the Ri Channel is looking to change that:
This is X-ray crystallography.
Discovered in 1913 by William and Lawrence Bragg, x-ray crystallography is a technique that reveals the atomic and molecular structure of a crystal. When a narrow beam of x-rays is shown through the crystal, it diffracts into a pattern of rays through the other side.
"To date 28 Nobel Prizes have been awarded to projects related to the field" and 100 years after its discovery, the Curiosity Rover is using x-ray crystallography to analyze soil on Mars.
Science! And if you haven’t seen these yet, we’ve shared some of our favorite science videos for kids over at RiChannel.org, where they know great science videos.
The Leidenfrost Maze, designed and built by Carmen Cheng and Matthew Guy at the University of Bath, demonstrates how Leidenfrost droplets can be self-propelled in a controlled way by the jagged texture of the hot surface.
And what exactly is the Leidenfrost Effect? From PopSci:
The basic idea is, when a liquid comes in contact with something really hot—about twice as hot as the liquid’s boiling point, although it changes on certain factors like the size of the drop—the liquid never comes in direct contact with the surface; vapor acts as a barrier that keeps the two separated. When you flick drops of water on to a pan to check the heat, that skittering you see and hear is because of this effect.
Cheng and Guy made the aluminum block maze to inspire and share science with local school kids, though we’re guessing every school around the world would love a physics demonstration kit like this.
There are more excellent physics videos in the archives.
via PopSci, thanks @kvetchup.