Electromagnetic radiation and B fields in EMR are in-phase (see math section below). An important aspect of light's nature is its frequency. The frequency of a wave is its rate of oscillation and is measured in hertz, the SI unit of frequency, where one hertz is equal to one oscillation per second. Light usually has multiple frequencies that sum to form the resultant wave. Different frequencies undergo different angles of refraction, a phenomenon known as dispersion. A wave consists of successive troughs and crests, and the distance between two adjacent crests or troughs is called the wavelength. Waves of the electromagnetic spectrum
The Crests No: 160201) Unreleased recordings The Crests The Crests were an American doo-wop group, formed by bass vocalist J.T. Carter in the mid 1950s. The group had several Top 40 hits in the late 1950s and early 1960s on Coed Records. Their most popular song, "16 Candles", rose to #2 on the "Billboard" Hot 100 chart in February 1959 selling over one million copies and earning a gold disc status. The group's other hits include "Step By Step", "The Angels Listened In", "Trouble In Paradise", "Six Nights A Week", and "A Year Ago Tonight". The Crests were the first interracially mixed