Julian Schwinger proposed that a mechanism involving these structures is explained by the conversion of virtual photons into real photons. Werner (-5[1])Lauterborn’s model of that mechanism involving these structures was improved by the Keller–Miksis model. (10[1])The high internal temperature of a process involving these structures has been attributed to hotspot or bremsstrahlung radiation and was proposed as a nuclear fusion candidate (-5[2])in the fraudulent work of R. P. Taleyarkhan. (-5[1])The (10[1])Rayleigh–Plesset equation (10[1])for these structures (10[2])is (10[1])derived (10[2])from (10[1])spherically symmetric solutions to the Navier–Stokes equations. (10[1]-5[2])Light is emitted (-5[1])from these structures’ (-5[3])implosions in (-5[2])sonoluminescence. (10[8]-5[3])These (10[2])structures (10[2]-5[1])form through cavitation. (10[9])For (10[1])10 points, (-5[1])name these (10[1])spherical (10[1])pockets of air (10[4])that can be formed from (-5[1])thin films (10[1])made of soap. (10[1])■END■ (10[22]0[1])