We’re used to radiation being invisible. With a Geiger counter, it gets turned into audible clicks. What you see above, though, is radiation’s effects made visible in a cloud chamber. In the center hangs a chunk of radioactive uranium, spitting out alpha and beta particles. The chamber also has a reservoir of alcohol and a floor cooled to -40 degrees Celsius. This generates a supersaturated cloud of alcohol vapor. When the uranium spits out a particle, it zips through the vapor, colliding with atoms and ionizing them. Those now-charged ions serve as nuclei for the vapor, which condenses into droplets that reveal the path of the particle. The characteristics of the trails are distinct to the type of decay particle that created them. In fact, both the positron and muon were first discovered in cloud chambers! (Image credit: Cloudylabs, source)
So the sudden influx of Official art is because the FFXV team is at The Tokyo University of Arts as part of the University’s Animation to Game exhibition: FINAL FANTASY XV -The Creative Process- from July 21 to 30 (Closed on the 24).
The free exhibition will be displaying models, graphics, proposals that the Dev team made during production of FFXV. They’re also offering mini classes during their time at the University which is currently all full.