Optical Properties of a Liquid Water

Below the plasma frequency at about 15 eV the only appreciable deviation from Drude theory occurs near 1.5 eV, where interband electronic transitions produce a peak in t and associated structure in c with this exception, c for aluminum goes monotonically toward negative infinity and c toward positive infinity as the energy approaches zero. 

Optical properties of liquids are similar in many ways to those of solids. Electrically, there are metallic liquids such as mercury and molten iron, but the majority of common liquids are nonmetallic. As an illustration of a liquid we have chosen H20, a ubiquitous substance on our planet water dominates not only atmospheric processes but the chemistry of life. 

The optical properties of water have been studied for centuries the modern results are scattered throughout the literature of many scientific fields. Fortunately, several authors have critically surveyed the literature on H20 and have assembled collections of optical constants for broad wavelength ranges. I hese reviews include those by Irvine and Pollack (1968), Hale and Querry 

There is an important difference between an ionic crystal like MgO and a molecular substance such as liquid or solid H20. In the molecular substance there is a clear distinction between molecular and intermolecular modes because the atoms are bound into molecules much more tightly than the molecules are bound to one another. In the ionic crystal there is no such 

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