Talbot resonator

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Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( … Wikipedia
Wesleyan University people — This is a list of notable people affiliated with Wesleyan University.Administration and facultyAcademia* Hannah Arendt, Fellow 1962 1963, Political theorist * Wilbur Olin Atwater, 1865 (Wesleyan B.S.), first Professor of Chemistry; known for his… … Wikipedia
Ball lightning — is an atmospheric electrical phenomenon, the physical nature of which is still controversial. The term refers to reports of luminous, usually spherical objects which vary from pea sized to several meters in diameter. It is sometimes associated… … Wikipedia
History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia
Polaritonics — is an intermediate regime between photonics and sub microwave electronics (see Fig. 1). In this regime, signals are carried by an admixture of electromagnetic and lattice vibrational waves known as phonon polaritons, rather than currents or… … Wikipedia

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