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Cheironomy or chironomy is a form of music conducting, typically with choral music and choral groups , where the use of hand gestures directs musical performance. In the modern artform, conductors tend to hoist batons for indicating melodic curves and ornaments.
Aspiring conductors need to obtain a broad education about the history of music, including the major periods of classical music and regarding music theory. Many conductors learn to play a keyboard instrument such as the piano or the pipe organ , a skill that helps them to be able to analyze symphonies and try out their interpretations before ...
A variety of musical terms are encountered in printed scores, music reviews, and program notes. Most of the terms are Italian, in accordance with the Italian origins of many European musical conventions. Sometimes, the special musical meanings of these phrases differ from the original or current Italian meanings.
[9]: figs.7,8 Once the Poynting vector enters the conductor, it is bent to a direction that is almost perpendicular to the surface. [16]: 61 This is a consequence of Snell's law and the very slow speed of light inside a conductor. The definition and computation of the speed of light in a conductor can be given.
Conductors view their gestures as the primary means to communicate musical ideas, whether or not they choose to use batons. Leonard Bernstein is quoted as saying, "If one [the conductor] uses a baton, the baton itself must be a living thing, charged with a kind of electricity, which makes it an instrument of meaning in its tiniest movement."
In mathematics and physics, the right-hand rule is a convention and a mnemonic, utilized to define the orientation of axes in three-dimensional space and to determine the direction of the cross product of two vectors, as well as to establish the direction of the force on a current-carrying conductor in a magnetic field.
This means that the direction of the back EMF of an induced field opposes the changing current that is its cause. D.J. Griffiths summarized it as follows: Nature abhors a change in flux. [7] If a change in the magnetic field of current i 1 induces another electric current, i 2, the direction of i 2 is opposite that of the change in i 1.
By convention, it's the direction from North to South magnetic pole. Then the second finger represents the direction of the induced or generated current within the conductor (from + to −, the terminal with lower electric potential to the terminal with higher electric potential, as in a voltage source)