Wave amplitude formula_4 described by the equation: where The units of the amplitude depend on the type of wave. Transverse mechanical waves (e.g., a wave on a string) have an amplitude expressed as a distance (e.g., meters), longitudinal mechanical waves (e.g., sound waves) use units of pressure (e.g., pascals), and electromagnetic waves (a form of transverse vacuum wave) express the amplitude in terms of its electric field (e.g., volts/meter). The wavelength formula_30 is the distance between two sequential crests or troughs (or other equivalent points), generally is measured in meters. A wavenumber formula_17, the spatial frequency of the wave in radians
The Crests & The Crests", producing a single for United Artists in 1962, two singles for Cameo Records in 1963-64, a single for APT Records in 1965, a single for Scepter Records in 1965, and three singles for the Parkway label in 1966. James Ancrum then took over the lead, recording "Guilty" in January 1962 and charting only to #123. The group went back to touring when their 1963 Selma side "Did I Remember?" flopped. A 1964 sequel to "16 Candles", "You Blew Out The Candles", also was not successful. In 1965, J.T. Carter and Mel Tillison signed with Decca Records and