Propagation constant a conductor. The skin effect causes R along the conductor to be approximately dependent on frequency according to Losses in the dielectric depend on the loss tangent (tan "δ") of the material divided by the wavelength of the signal. Thus they are directly proportional to the frequency. The attenuation constant for a particular propagation mode in an optical fiber is the real part of the axial propagation constant. In electromagnetic theory, the phase constant, also called phase change constant, parameter or coefficient is the imaginary component of the propagation constant for a plane wave. It represents the change in phase
The Crests charted with their first release, "Sweetest One", on Joyce Records. After recording two more singles for Joyce Records, Patricia Vandross left The Crests in 1958 to finish her education. Their next single after "16 Candles" on COED Records was "Six Nights A Week" which hit #28 on the "Billboard" Hot 100 Charts and #17 on the R&B. Their next release "Flower Of Love" was bland compared to other Crests cuts and attained only a six-week run-up to #79. From 1958 to 1960 the group was almost always on the road. In the late 1950s, The Crests performed on several national