leitmotif [(leyet-moh-teef)] A frequently recurring bit of melody, usually in opera, associated with a person, thing, or emotion; Leitmotiv is German for âleading theme.â The leitmotif may be heard in the instrumental or the vocal part. Note: Leitmotifs are particularly associated with the operas of Richard Wagner.
Synthwave (2000s genre) Synthwave (also called outrun, retrowave, and futuresynth) is a genre of electronic music influenced by 1980s film soundtracks and video game music. Beginning in the mid 2000s, the genre developed from various niche communities on the Internet, reaching wider popularity in the early 2010s.
Schlieren photograph of an attached shock on a sharp-nosed supersonic body. In physics, a shock wave (also spelled shockwave), or shock, is a type of propagating disturbance. When a wave moves faster than the local speed of sound in a fluid it is a shock wave. Like an ordinary wave, a shock wave carries energy, and can propagate through a medium; however it is characterized by an abrupt, nearly discontinuous change in pressure, temperature and density of the medium.