Optical properties of some terrestrial rocks and glasses |
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| Authors: | James B Pollack Owen B Toon Bishun N Khare |
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| Institution: | Space Science Division, Ames Research Center, NASA, Moffett Field, California 9403, USA;Laboratory for Planetary Studies, Center for Radiophysics and Space Research Cornell University, Ithaca, New York 14850, USA |
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| Abstract: | The optical constants of five naturally occurring rocks have been determined in the spectral range between 0.2 and .50 μm. Between 0.2 and 5 μm, the real and imaginary parts of the index of refraction were found from a combination of reflectivity and transmission measurements by using Beer's law and the Fresnel reflectivity equation. At wavelenths beyond 5 μm only reflectivity measurements could be made and both constants were found from an application of classical dispersion theory. These optical constants will be valuable for studies of the interaction of light with rock surfaces, atmospheric dust and interplanetary and interstellar dust grains. |
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