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dictionary.reference.com
a number indicating the speed of light in a given medium as either the ratio of the speed of light in a vacuum to that in the given medium (absolute index of ...

www.thefreedictionary.com/index+of+refraction
index of refraction n. The ratio of the speed of light in a vacuum to the speed of light in a medium under consideration. Also called refractive index. in′dex of refrac′tion n. a number indicating the speed of light in a given medium, usu. as the ratio of the speed of light in a vacuum or in ...

www.britannica.com
refractive index, also called index of refraction, measure of the bending of a ray ... and the normal), the refractive index n is defined as the ratio of the sine of the ...

dictionary.reference.com/browse/refraction
Refraction definition, Physics. the change of direction of a ray of light, sound, heat, or the like, ... refraction is different from gravitational lensing because the index of refraction depends on wavelength.

www.thefreedictionary.com
The ratio of the speed of light in a vacuum to the speed of light in a medium under consideration. Also called refractive index. American Heritage® Dictionary of ...

en.wikipedia.org/wiki/Refractive_index
In optics the refractive index or index of refraction n of an optical medium is a dimensionless number that describes how light, or any other radiation, propagates through that medium. It is defined as where c is the speed of light in vacuum and v is the phase velocity of light in the medium ...

dictionary.reference.com/browse/index-refraction
index of refraction A measure of the extent to which a substance slows down light waves passing through it. The index of refraction of a substance is equal to the ratio of the velocity of light in a vacuum to its speed in that substance.

hyperphysics.phy-astr.gsu.edu
Refraction is the bending of a wave when it enters a medium where its speed is ... The index of refraction is defined as the speed of light in vacuum divided by ...

www.merriam-webster.com/dictionary/refraction
Medical Definition of REFRACTION . 1: the deflection from a straight path undergone by a light ray or a wave of energy in passing obliquely from one medium (as air) into another (as water or glass) in which its velocity is different

www.learner.org
A material's index of refraction is defined as the speed that light travels in the material divided by the speed of light in a vacuum. Therefore, the index of refraction ...

en.wikipedia.org/wiki/Refraction
In optics, refraction is a phenomenon that often occurs when waves travel from a medium with a given refractive index to a medium with another at an oblique angle.

www.merriam-webster.com
the ratio of the speed of radiation (as light) in one medium (as air, glass, or a vacuum) to that in another medium. See refractive index defined for kids.

www.merriam-webster.com/dictionary/refractive%20index
Definition of REFRACTIVE INDEX: the ratio of the speed of radiation (as light) in one medium (as air, glass, or a vacuum) to that in another medium

physics.tutorvista.com
This is the phenomena of refractive index which measure the bending of light when ... The Index of refraction is defined as "The ratio of the angle of incidence of ...

www.thefreedictionary.com/Refraction+index
refractive index. n. See index of refraction. refractive index. n. 1. (General Physics) physics a measure of the extent to which radiation is refracted on passing through the interface between two media.

www.yourdictionary.com/index-of-refraction
the ratio of the sine of the angle of incidence to the sine of the angle of refraction for a ray of light crossing from one medium into another

www.vocabulary.com/dictionary/index%20of%20refraction
DEFINITIONS OF: index of refraction. 1. n the ratio of the velocity of light in a vacuum to that in a medium. Synonyms: refractive index Type of: ratio. the relative magnitudes of two quantities (usually expressed as a quotient) Visual Thesaurus. WORD FAMILY.

medical-dictionary.thefreedictionary.com/Index+of+refraction...
Index of refraction A constant number for any material for any given color of light that is an indicator of the degree of the bending of the light caused by that material. Mentioned in: Eye Glasses and Contact Lenses index of refraction The ratio of the speed of light in a vacuum or in air, c ...

amazing-space.stsci.edu/.../term-full.php?t=refraction
Refraction. Refraction is the bending of light as it passes from one substance to another. Here, the light ray passes from air to glass and back to air.

Refraction explains why light bends in water. But did you know that mathematical laws determine exactly how light waves are bent? In this lesson, we'll explore the mechanics of wave refraction, including Snell's Law and the index of refraction.

thesciencedictionary.org/refractive-index
Definition of REFRACTIVE INDEX: For a transparent medium, the ratio of the phase velocity of electromagnetic waves in free space to that in the medium. It is given by the square root of t

www.yourdictionary.com/refraction
Refraction is the bending of a light or sound wave, or the way the light bends when entering the eye to form an image on the retina.

The basic eye refraction definition is the deflection of light from a straight path that takes place within the human eye. This definition considers the fact that light hits the various organs of your eye and reacts by moving, or being refracted, off its normally straight path.

dictionary.reverso.net/english-definition/index%20of%20...
index of refraction definition, meaning, English dictionary, synonym, see also 'index',card index',cephalic index',colour index', Reverso dictionary, English definition, English vocabulary

www.biology-online.org/dictionary/Refraction
Definition and other additional information on Refraction from Biology-Online.org dictionary.

thesciencedictionary.org/refraction
Definition of REFRACTION: Phenomenon which occurs when a wave crosses a boundary between two media in which its phase velocity differs. This leads to a change in the direction of pr

medical-dictionary.thefreedictionary.com/Refraction
index of refraction See index of refraction. laser refraction A method of subjective refraction in which the patient observes a slowly rotating drum, on the surface of which is perceived a speckle pattern resulting from illumination by a laser.

Definition: Refraction is the phenomenon when a wave changes direction due to a change in speed of the wave, most notably in response to the wave traveling from one medium to another.

index of refraction: Definition and Pronunciation ... Strict Standards: Non-static method FenSites::linkTo() should not be called statically in /site/html/dictionary/index-of-refraction.html on line 105 index number

dictionary.babylon.com/index%20of%20refraction
In optics the refractive index or index of refraction n of an optical medium is a dimensionless number that describes how light, or any other radiation, propagates through that medium.

scienceworld.wolfram.com/physics/IndexofRefraction.html
The index of refraction is defined by n \equiv {c\over v_{\rm phase}}, where c is the speed of light and v_{\rm phase} is the phase velocity. It gives the amount of refraction which takes place for light passing from one medium to another. A complex index of refraction can be defined for ...

origin-dictionary.reference.com/browse/index+of+refraction
Index of refraction definition, a number indicating the speed of light in a given medium as either the ratio of the speed of light in a vacuum to that in the given medium (absolute index of refraction) or the ratio of the speed of light in a specified medium to that in the given medium (relative ...

encyclopedia2.thefreedictionary.com/Refraction+of+waves
Refraction of waves. The change of direction of propagation of any wave phenomenon which occurs when the wave velocity changes. The term is most frequently applied to visible light, but it also applies to all other electromagnetic waves, as well as to sound and water waves.

theory.uwinnipeg.ca/physics/light/node5.html
Dispersion Up: Wave Properties of Light Previous: Reflection. Refraction Definition: Refraction Refraction is the bending of light as it passes between materials of different optical density.

www.webster-dictionary.org/definition/index%20of%20...
index of refraction explanation. Definition of index of refraction is provided by 1913 Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary.

Learn the definition of refraction as it relates to your eye or vision exam, along with different methods of refraction, from the About.com Vision Expert.

All of the angles in Snell's Law are measured from the normal (the imaginary dashed vertical line shown in the figure). When light goes from a medium with a smaller index of refraction to one with a larger index of refraction, the angle gets smaller (bends toward the normal).

www.audioenglish.org/dictionary/refraction.htm
Definition of refraction in the AudioEnglish.org Dictionary. Meaning of refraction. What does refraction mean? Proper usage of the word refraction. Information about refraction in the AudioEnglish.org dictionary, synonyms and antonyms.

www.collinsdictionary.com/.../english/index-of-refraction
Definition of “index of refraction” | The official Collins English Dictionary online. Comprehensive and authoritative, rely on Collins for up-to-date English with insights into language trends and usage.

encyclopedia2.thefreedictionary.com/refraction
Information about Refraction in the Columbia Encyclopedia, Computer Desktop Encyclopedia, computing dictionary. refraction of light, index of refraction, double refraction. Refraction definition of Refraction in the Free Online ...

www.audioenglish.org/dictionary/index_of_refraction.htm
Definition of index of refraction in the AudioEnglish.org Dictionary. Meaning of index of refraction. What does index of refraction mean? Proper usage of the word index of refraction. Information about index of refraction in the AudioEnglish.org dictionary, synonyms and antonyms.

dictionary.kids.net.au/word/refraction
Definition of refraction the amount by which a propagating wave is bent; the change in direction of a propagating wave (light or sound) when passing from one medium to another; Similar Words: deflection, deflexion . Hyponyms: double refraction, birefringence .

www.dictionaryofengineering.com/.../refractive-index.html
refractive index definition - The ratio of the phase velocity of a wave in free space, to the phase velocity of the same wave in a given medium. Also called absolute index of refraction (1).

dictionary.factmonster.com/index-of-refraction
index of refraction: Definition and Pronunciation. Home; World & News; U.S. People; Word Wise; Science; Math & Money; Sports; Cool Stuff; Games & Quizzes; Homework Center; Fact ... in'dex of refrac'tion

www.learner.org/courses/physics/glossary/definition.html?......
index of refraction. A material's index of refraction is defined as the speed that light travels in the material divided by the speed of light in a vacuum.

www.lexic.us/definition-of/refraction

www.definitions.net/definition/refractive%20index
Freebase Rate this definition: (0.00 / 0 votes) Refractive index. In optics the refractive index or index of refraction n of a substance is a dimensionless number that describes how light, or any other radiation, propagates through that medium.

dictionary.reverso.net/english-definition/refraction
refraction definition, meaning, English dictionary, synonym, see also 'double refraction',angle of refraction',index of refraction',reaction', Reverso dictionary, English definition, English vocabulary