This video about superconductors is spectacular! It was sponsored in the 1960s by the National Science Foundation and is narrated by Alfred Leitner of liquid helium movie fame. The video contains most of the background material necessary for our experimental search for H-rays. It explains and demonstrates the Meissner effect, the critical temperature, pumping on liquid helium to reduce its temperature, and quenching of superconductors via magnetic field. Parts of it are directed at folks who have had an undergraduate physics class, but as a whole, it's intended for everyone. The demos are all done in a very large glass Dewar so you can see everything as it happens!
#physics #physicseducation #superconductor #hrays