Metal, definition INDEX

How effectively shonld yonr light source render colors The higher the color rendering index (CRI) of a lamp, the better individual colors will be rendered. The CRI compares how closely a light sonrce will render colors to a standard.The standard is usually an incandescent lamp, which is, by definition, a black body and has a CRI of 100, the highest rating (Table 5.40). Metal halide lamps nsnally have a CRI between 65 and 85. By comparison, high-pressure sodium lamps have a CRI of 22. 

It is convenient to first establish some definitions, and these are listed in Table 6.2. As discussed in Chapter 5, as an adsorbate approaches a surface, changes occur in the potential energy of the system and one must relate this energy, Epot, to the distance, r, from the surface. It is certainly anticipated that the migration and dissociation of an adsorbate, X, on the surface involve changes in the coordination mode, Mn — X, and the M-X distance, r, where M is a metal atom and n is the coordination number. Assuming quasi-spherical interactions, a two-center M-A bond index, x, in the form of Pauling s bond order [23], is defined as... 

In Figure 10.1, the electric vectors of the incident and reflected rays on the metal surface are shown as illustrated, the electric vector of the reflected ray for the s-wave always has a phase shift of about -180 from that of the incident ray (effectively creating a node at the metal surface), whereas the phase shift for the reflected p-wave depends on the angle of incidence as described below. The definition of the phase shift follows established practice [1,4-6]. In Figure 10.2, the amplitude of the reflection coefficients (p, p ) and phase shifts (Tj, Tp) calculated by the Fresnel equations for the radiation reflected from a metal surface are shown. The definition of the phase shifts in this figure is the same as those shown in Figure 10.1. For this calculation, the complex refractive-index values of gold (n = 15.9... 

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