| 41. | Perhaps the most surprising one is a negative index of refraction, the measure of how a given material bends light.
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| 42. | The scattering and reflection spectra of a material are influenced by both its index of refraction and its absorption spectrum.
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| 43. | The change in index of refraction between the QC material and the overgrown material is sufficient to create a waveguide.
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| 44. | Finally, negative index of refraction was achieved for terahertz wavelengths at 200 terahertz using layer pairs metallic nanorods in parallel.
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| 45. | The ratio between and the phase velocity is called the refractive index or index of refraction of the material ( ).
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| 46. | The reverse of the electromagnetic wave, characterized by an antiparallel phase velocity is also an indicator of negative index of refraction.
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| 47. | The relative index of refraction of the outer ( " insulating " ) layer determines the signal integrity and loss rate.
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| 48. | In contrast, for visible light the index of refraction is larger than unity and focusing is done with a convex lens.
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| 49. | Meta-materials with a negative index of refraction may reduce the cost and improve the performance of many devices used in wireless communications,
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| 50. | The index of refraction of air increases in both cases and the EM wave bends toward the ground instead of continuing upward.
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