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- Definição1
- (1) The amplitude of a wave is the maximum displacement, or the maximum value, it attains from its mean position during a cycle. It is both positive and negative. With sound waves, the greater the amplitude, the louder is the sound. (2) Angular distance north or south of the prime vertical; the arc of the horizon or the angle at the zenith between the prime vertical and a vertical circle, measured north or south form the prime vertical circle. The term is used customarily only to refer to bodies whose centers are on the celestial horizon and is prefixed "E" or "W" as the body is rising or setting, respectively, and suffixed "N" or "S" to agree with the declination.
- Fonte1
- KUMAR, Bharat (ed.). An illustrated dictionary of aviation. New York: McGraw-Hill, c2005. 752 p.
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