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1Metamaterial - Wikipedia, the free encyclopedia 2 Citations The main reason researchers have investigated metamaterials is the possibility to create a structure with a negative refractive index, since this property is not found in any naturally occurring material. Almost all materials encountered in optics, such as glass or water, have positive values for both permittivity ? and permeability ?. However, many metals (such as silver and gold) have negative ? at visible wavelengths. A material having either (but not both) ? or ? negative is opaque to electromagnetic radiation (see surface plasmon for more details)., delicious.com
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cosmetic surgery/laser eye surgery 1 Citation
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RefractiveIndex.INFO - Refractive index database 1 Citation Web application that plots the refractive index as a function of wavelength of hundreds of materials., delicious.com
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ArtiCalc online PIOL calculation - Ophtec 1 Citation
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TERAPIA REFRACTIVA CORNEAL CRT Clínica Dr. Ramon Gutierrez 1 Citation
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SOPRA is a thin film metrology company 1 Citation Refractive index database of 290 materials; metals, plastics, glasses, semiconductors etc., delicious.com
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How Lasik Works and What this Eye Surgery Entails 1 Citation Understanding how lasik works is important if you are thinking about having laser eye surgery to correct eyesight problems. Read an overview of lasik surgery., delicious.com
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Refractive Index List of Substances - Table of Refraction Indices 1 Citation
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List of refractive indices - Wikipedia, the free encyclopedia 1 Citation Many materials have a well-characterized refractive index, but these indices depend strongly upon the frequency of light. Standard refractive index measurements are taken at yellow sodium D line, 589 nanometres, delicious.com
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