Interferometry uses the principles of interference to determine properties about waves, their sources, or the wave propagation medium. Acoustic interferometry has been applied to study the velocity of sound in a fluid. Radio astronomers use...

An interferometer is a device constructed to split a beam of light into two perpendicular beams and then to bring the two beams together again. Any difference between the beams creates a pattern of interference that manifests itself as a group of...

One of the greatest topics for debate in the late nineteenth century was the nature of light: classical physicists believed that light was an undulatory wave--that it moved through a medium, just as sound does through air and tides through water. They...

A radio interferometer was invented by merging radio astronomy with computer technology. Radio astronomy began in the 1930s when Karl Jansky (1905-1950) built a radio receiver designed to locate interference that was plaguing long distance telephone...

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