aberration of light accademia del cimento albert einstein angle ankara aristotelian physics aristotle astronomy atomic clock bathyscaphe trieste beam splitter blue shift book of optics british land speed record caesium california camera obscura cannon celeritas central processing unit christiaan huygens digital object identifier epr paradox early islamic philosophy earth edward morley electromagnetic radiation electromagnetic wave equation electron empedocles ernst mach euclid evanescent wave faster-than-light fastest production car flight airspeed record flight altitude record flight distance record flight endurance record florence francis bacon free space frequency front velocity fundamental speed galileo galilei general relativity giovanni domenico cassini glass global positioning system gravitational wave group velocity harvard university henri joseph anastase perrotin hippolyte fizeau history of india hour ibn al-haytham information integrated circuit interference invariant mass isaac beeckman isaac newton james bradley james clerk maxwell johannes kepler kilobyte land speed record land speed record for railed vehicles lantern laser latin lebedev physical institute lene hau light-year light cone list of spaceflight records list of vehicle speed records louis essen luminiferous aether lunar eclipse mactutor history of mathematics archive marie alfred cornu mathematical descriptions of the electromagnetic field matter metre microwave miles per hour mirror mission control center moon motorcycle land speed record mount san antonio natural units navigation no-communication theorem normal mode null result optical fiber opticks particle physics permittivity phase velocity photonic crystal physical constant physical cosmology ping polarization polarization density portable document format projection proper velocity ptolemy quantum electrodynamics quantum entanglement quantum mechanics quantum state quantum superposition quantum tunnelling quasar radar radio galaxy redshift refraction refractive index relativistic jet relativity of simultaneity right angle rigveda robert hooke roger bacon royal society rubidium sayana second shock wave simon newcomb sinusoidal plane-wave solutions of the electromagnetic wave equation slow light sonic boom sound barrier spacetime special relativity speed of sound star sun supercomputer superluminal motion synchronization tachyon taqi al-din telecommunication telescope the thomson corporation theory of relativity transcontinental air speed record underwater speed record vacuum vacuum state variable speed of light velocity-addition formula visible spectrum visual perception water water speed record wavelength wikibooks wikinews wind witelo world war ii