electromagnetic mixing
81Optical heterodyne detection — is an important special case of heterodyne detection. In heterodyne detection, a signal of interest at some frequency is non linearly mixed with a reference local oscillator (LO) that is set at a close by frequency. The desired outcome is the… …
82actinide element — ▪ chemical element group Introduction any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103). As a group they are significant largely because of their radioactivity.… …
83The Day After — This article is about the 1983 television film. For other uses, see The Day After (disambiguation). The Day After The Day After DVD cover Genre …
84Balanced line — In telecommunications and professional audio, a balanced line or balanced signal pair is a transmission line consisting of two conductors of the same type, and equal impedance to ground and other circuits. [Young EC, The Penguin Dictionary of… …
85Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after …
86Hawking radiation — is a thermal radiation with a black body spectrum predicted to be emitted by black holes due to quantum effects. It is named after the physicist Stephen Hawking, who provided a theoretical argument for its existence in 1974, and sometimes also… …
87Mauna Kea — with its seasonal snow cap visible Elevation 4,205 m (13,796  …
88Polariton — In physics, polaritons are quasiparticles resulting from strong coupling of electromagnetic waves with an electric or magnetic dipole carrying excitation. They are an expression of the common quantum phenomenon known as level repulsion, also… …
89List of fictional diseases — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. This article is a list of fictional diseases nonexistent, named medical conditions… …
90Isospin — In physics, and specifically, particle physics, isospin ( isotopic spin , isobaric spin ) is a quantum number related to the strong interaction. This term was derived from isotopic spin , but the term isotopic spin is confusing as two isotopes of …
