refraction velocity

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• Refraction microtremor — (ReMi) is a surface performed geophysical survey developed by Dr. John Louie (and others) based on previously existing principles of evaluating surface waves and in particular Rayleigh waves. Since Rayleigh waves are dispersive, the propagating… …   Wikipedia

• Refraction — For the property of metals, see refraction (metallurgy). For the magic effect, see David Penn (magician). For the refraction in atmosphere, see Atmospheric refraction. Light on air–plexi surface in this experiment mainly undergoes refraction… …   Wikipedia

• Refraction — In ophthalmology, the bending of light that takes place within the human eye. Refractive errors include nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. Lenses can be used to control the amount of refraction, correcting… …   Medical dictionary

• refraction — refractional, adj. /ri frak sheuhn/, n. 1. Physics. the change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different. 2. Ophthalm. a. the ability of the …   Universalium

• refraction — re•frac•tion [[t]rɪˈfræk ʃən[/t]] n. 1) opt phs the change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different 2) oph a) the ability of the eye to… …   From formal English to slang

• refraction — noun Date: 1603 1. deflection from a straight path undergone by a light ray or energy wave in passing obliquely from one medium (as air) into another (as glass) in which its velocity is different 2. the change in the apparent position of a… …   New Collegiate Dictionary

• refraction —    The change in direction observed when light passes obliquely from one medium to another in which it travels with a different velocity …   Forensic science glossary

• Negative refraction — is the name for an electromagnetic phenomenon where light rays are refracted at an interface in the reverse sense to that normally expected. Such an effect can be obtained using a metamaterial which has been designed to achieve a negative value… …   Wikipedia

• index of refraction — noun the ratio of the velocity of light in a vacuum to that in a medium • Syn: ↑refractive index • Hypernyms: ↑ratio * * * : the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it… …   Useful english dictionary

• law of refraction — a law in physics: in the refraction of radiation at the interface between two isotropic media the incident ray and the corresponding refracted ray are coplanar with the refracting surface at the point of incidence and the ratio of the sine of the …   Useful english dictionary

• Seismic refraction — is a geophysical principle (see refraction) governed by Snell s Law. Used in the fields of engineering geology, geotechnical engineering and exploration geophysics, seismic refraction traverses (seismic lines) are performed using a seismograph(s) …   Wikipedia