Cherenkov radiation permeability and formula_16 is the index of refraction of the material the charge particle moves through. Unlike fluorescence or emission spectra that have characteristic spectral peaks, Cherenkov radiation is continuous. Around the visible spectrum, the relative intensity per unit frequency is approximately proportional to the frequency. That is, higher frequencies (shorter wavelengths) are more intense in Cherenkov radiation. This is why visible Cherenkov radiation is observed to be brilliant blue. In fact, most Cherenkov radiation is in the ultraviolet spectrum—it is only with sufficiently accelerated charges that it even becomes visible; the sensitivity of the human eye peaks at green,
A Sense of Direction restrain ...Were it not for the slight conventionality of some of the numbers, the rating would have been five stars." "All compositions by Walt Dickerson except as indicated" A Sense of Direction A Sense of Direction is an album led by vibraphonist and composer Walt Dickerson recorded in 1961 and released on the New Jazz label. AllMusic awarded the album 4½ stars with its review by Steve Huey stating, "If it's a shade less challenging and inventive than "This Is Walt Dickerson!", "A Sense of Direction" compensates by making Dickerson's innovations more accessible and inviting". Down Beat reviewer Pete Welding