frequency doubling phase-locked system
21Hurricane Katrina — Infobox Hurricane Name=Hurricane Katrina Type=hurricane Year=2005 Basin=Atl Image location=Hurricane Katrina August 28 2005 NASA.jpg Formed=August 23, 2005 Dissipated=August 30, 2005 1 min winds=150 Pressure=902 Da Inflated=1 Damagespost=… …
22subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …
23Timeline of luminiferous aether — The timeline of luminiferous aether begins in the late 19th century with the concept of luminiferous aether ( light bearing aether ), or ether, as a medium for electromagnetic propagation. The aether was assumed to exist for much of the 19th… …
