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 group continued well into the 1990s and toured with a five-piece band including Leona Carter on keys. The 1984 John Hughes' teen film "Sixteen Candles" took its title from The Crests' song, which was re-recorded by The Stray Cats for the"Sixteen Candles" soundtrack. In June 1987, for a concert in Peekskill, New York, Maestro, Carter, Torres, and Gough (The Original Crests) reunited as "The Crests", which was organized by Carter. From 1990-2010, Johnny Maestro invited Carter to join him and The Brooklyn Bridge to record with them and to re-record some of their greatest hits. From the late 2000s until