25. The metals and non-metals differ in their properties. These elements were classified by Lavoisier in to metals and non-metals by studying their properties. These volumes have gone out of print but the data were abridged and published in the Handbook of Chemistry and Physics . Based on the optical properties of metals and the physics behind infrared and optical imaging  , a close spectrum correlation of two modality images is identified. Optical properties of materials-Metal Drude Model • Conduction Current in Metals • EM Wave Propagation in Metals • Skin Depth • Plasma Frequency Metals And Their Properties- Physical and Chemical All the things around us are made of 100 or so elements. Preface The Handbook of Optical Materials is a compilation of the physical properties of optical materials used in optical systems and lasers. The optical properties of solids provide an important tool for studying energy band struc- ture, impurity levels, excitons, localized defects, lattice vibrations, and certain magnetic excitations. Studies of the optical properties of the transition metals culminated in 1981 in a two volume set of figures and tables [1, 2]. Discrepancies appeared among the results obtained by various experimenters and it was soon determined that these were the result of differences in the methods used to prepare the samples. predict the optical properties of metals as: 2 2 1 2 P n metal j 0 , dP Et dt 2 0 2 1 2 P metal j or It is instructive to compare the ‘guess’ from last lecture to this new result, and see where they are similar. OPTICAL PROPERTIES OF METALS 343 interested in measuring either the reflecti~ity6~*6~the absorption or coefficient and have not determined the optical constants. Main Group Al, Ga, In, Sn, Tl, Pb, Bi, Po. It contains extensive data tabulations but with a minimum of narration, in a style similar to that of the CRC Handbook of Chemistry and Physics. For science students, it provides a broad introduction to the subject and the many applications of colour. alkali elements Li, Na, K, Rb, Cs, Fr Colour and the Optical Properties of Materials carefully introduces the science behind the subject, along with many modern and cutting-edge applications, chosen to appeal to today's students.