| refraction |
The change of direction of a sound beam when passing obliquely from one medium into another, where its wave velocity is different. Refraction is a type of ray bending that will affect acoustic returns for proper sonar imaging. This occurs when sonar pulses encounter thermal and haline discontinuities. In a normal summer thermocline environment, a side scan beam can be refracted sharply to the seafloor severely limiting range. (See Ray Bending).
출처: www.instituteformarineacoustics.org/SonarPrimer/da...
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| refraction |
Process by which the direction of sound propagation is changed as a result of a spatial variation in the speed of sound in the medium.
출처: users.aol.com/inceusa/glossary.html
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| refraction of eye |
The refraction brought about by the refractive media of the eye (cornea, aqueous humor, crystalline lens, vitreous body). SYN: ocular refraction .
출처:
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| refraction p. |
the point at which a ray of light is refracted.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| refractionist |
one skilled in determining the refracting power of the eyes and correcting refractive defects.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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