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  2. Quantization of the electromagnetic field - Wikipedia

    en.wikipedia.org/wiki/Quantization_of_the...

    Since harmonic oscillator energies are equidistant, the n-fold excited state | ; can be looked upon as a single state containing n particles (sometimes called vibrons) all of energy hν. These particles are bosons. For obvious reason the excitation operator † is called a creation operator.

  3. Harmonics (electrical power) - Wikipedia

    en.wikipedia.org/wiki/Harmonics_(electrical_power)

    Total harmonic distortion, or THD is a common measurement of the level of harmonic distortion present in power systems. THD can be related to either current harmonics or voltage harmonics, and it is defined as the ratio of the RMS value of all harmonics to the RMS value of the fundamental component times 100%; the DC component is neglected.

  4. List of fifth intervals - Wikipedia

    en.wikipedia.org/wiki/List_of_fifth_intervals

    The fundamental chords of tonal music—major and minor triads and also seventh chords—all contain fifth intervals.. Perfect fifths are contained in major and minor triads and in particular seventh chords (especially major-minor sevenths with dominant function, major sevenths, and minor sevenths).

  5. Overtone - Wikipedia

    en.wikipedia.org/wiki/Overtone

    F is the fundamental frequency; the third overtone is the third harmonic, 3F, and the fifth overtone is the fifth harmonic, 5F for such a pipe, which is a good model for a pan flute. An overtone is a partial (a "partial wave" or "constituent frequency") that can be either a harmonic partial (a harmonic ) other than the fundamental, or an ...

  6. Annus mirabilis papers - Wikipedia

    en.wikipedia.org/wiki/Annus_Mirabilis_papers

    The Einsteinhaus on the Kramgasse in Bern, Einstein's residence at the time. Most of the papers were written in his apartment on the first floor above the street level. At the time the papers were written, Einstein did not have easy access to a complete set of scientific reference materials, although he did regularly read and contribute reviews to Annalen der Physik.

  7. Unified field theory - Wikipedia

    en.wikipedia.org/wiki/Unified_field_theory

    For over a century, unified field theory has remained an open line of research. The term was coined by Albert Einstein, [3] who attempted to unify his general theory of relativity with electromagnetism. Einstein attempted to create a classical unified field theory, rejecting quantum mechanics. Among other difficulties, this required a new ...

  8. Einstein for Beginners - Wikipedia

    en.wikipedia.org/wiki/Einstein_for_Beginners

    Leonardo reviewer Nan Conklin stated that the work is "not simply a book explaining Einstein's scientific work, but a mixture of history, politics and science." [1] According to Science for the People reviewer Paul Thagard, "Einstein's work is related," in this book, "to the rise of electrical industries and the later development of the atomic ...

  9. List of scientific publications by Albert Einstein - Wikipedia

    en.wikipedia.org/wiki/List_of_scientific...

    Einstein's scientific publications are listed below in four tables: journal articles, book chapters, books and authorized translations. Each publication is indexed in the first column by its number in the Schilpp bibliography (Albert Einstein: Philosopher–Scientist, pp. 694–730) and by its article number in Einstein's Collected Papers.