noun: (chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid.
noun: (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium.
emission and absorption
Figure 2.11 - Center Seeking and Center Fleeing
Figure 3.25 - Celestial Seeks and Condenses at Center
Figure 3.33 - Syntropy Seeking Center - Entropy Fleeing from Center
Figure 9.4 - Radiation and Absorption interactions with Neutral Center
Sound Absorption Coefficient