Reflectance values express the percentage of light that is reflected back from a surface, the difference having been absorbed or transmitted by the surface.
Definition of AXIAL. 1. : of, relating to, or having the characteristics of an axis.
Â» Axial Strain. An axial bar of length L, and cross-sectional area A, subjected to tensile force P, elongates by an amount, D. The change in length divided by the initial length is termed ENGINEERING STRAIN (or simply strain).