Three related abilities may be used in clairvoyant psychic readings: 1  Clairvoyance, or the ability to see clearly. 2  Clairaudience, or clear hearing.  Clairsentience, or clear feeling (physical or emotional), also known as clear knowing.
In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency. Media having this common property may be termed dispersive media. Sometimes the term chromatic dispersion is used for specificity.
In reality, solute transport in groundwater never occurs solely by advection. Dispersion is the second very important transport mechanism. Dispersion refers to the spreading and mixing caused by molecular diffusion and by the variations in velocity with which water moves at different scales.