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Topic: Refraction

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In the News (Tue 23 Apr 19)

  Refraction of Light
Ar is the refractive angle between the light ray and the normal to the meduim to medium interface.
Using the refraction simulator, notice how the light bends toward the normal when the light enters a medium of greater refractive index, and away from the normal when entering a medium of lesser refractive index.
As you approach the critical angle the refracted light approaches 90 or -90 degrees and, at the critical angle, the angle of refractions becomes 90 or -90 and the light is no longer transmitted across the medium/medium interface.
www.ps.missouri.edu /rickspage/refract/refraction.html   (381 words)

 Refraction of Light Demonstration Applet
The index of refraction of the first medium is fixed at n=1.00.
The index of refraction of the second medium can be varied from n=1.00 (for vaccuum) to a maximum of n=2.42 (for diamond).
Notice that the refracted wavelength is shortened by a factor of 1/n.
www.control.co.kr /java1/RefractionofLight/LightRefract.html   (108 words)

 Refraction Arts and the Blue Theater Austin TX
Refraction Arts and the Blue Theater Austin TX home
Refraction Arts Project creates contemporary works of art across a variety of media, including film, theater, art and music.
We are especially interested in the intersection of these different media as we search for new stories, new sounds and images that pulse with life.
www.refractionarts.org   (108 words)

  Astronomical refraction
“Astronomical refraction” is the angular displacement of astronomical objects from their true or geometrical position, because of the bending of rays in the Earth's atmosphere.
While terrestrial refraction is often imperceptible to the naked eye, it's huge compared to the errors of measurement in surveying, which are a few seconds of arc, or less.
For this reason, all the refraction phenomena near the horizon — mirages, dip, terrestrial refraction, etc., as well as the astronomical refraction — are very sensitive to the temperature gradient; and they all vary a great deal more than does the astronomical refraction well up in the sky.
mintaka.sdsu.edu /GF/explain/atmos_refr/astr_refr.html   (884 words)

  refraction - Encyclopedia.com
Refraction is commonly explained in terms of the wave theory of light and is based on the fact that light travels with greater velocity in some media than it does in others.
The law of refraction relates the angle of incidence (angle between the incident ray and the normal) to the angle of refraction (angle between the refracted ray and the normal).
The index of refraction, n, of a transparent medium is a direct measure of its optical density and is equal to the ratio of the speed of light in a vacuum, c, to the speed of light in the medium: n = c/v.
www.encyclopedia.com /doc.aspx?id=1E1:refracti   (901 words)

  Refraction - Wikipedia, the free encyclopedia
Refraction is the change in direction of a wave due to a change in its velocity.
Refraction of light is the most commonly seen example, but any type of wave can refract when it interacts with a medium, for example when sound waves pass from one medium into another.
Refraction is also responsible for rainbows and for the splitting of white light into a rainbow-spectrum as it passes through a glass prism.
en.wikipedia.org /wiki/Refraction   (1035 words)

This constant is called the relative refractive index of the second medium, and may be denoted by uob, the suffix ab signifying that the light passes from medium a to medium b; similarly ~ denotes the relative refractive index of a with regard to b.
Refraction by a Prism.In optics a prism is a piece of transparent material bounded by two plane faces which meet at a definite angle, called the refracting angle of the prism, in a straight line called the edge of the prism; a section perpendicular to the edge is called a principal section.
The refracting angle of the prism, i in our previous notation, is determined by placing the prism with its refracting edge towards the collimator, and observing when the reflections of the slit in the two prism faces coincide with the cross-wires in the observing telescope; half the angle between these two positions gives i.
www.1911encyclopedia.org /R/RE/REFRACTION.htm   (2942 words)

The amount of refraction depends on the densities of the media, the angle at which the wave strikes the surface of the second medium, and the amount of bending and change of velocity corresponding to the wave's frequency (dispersion).
Refraction occurs with all types of progressive waves –; electromagnetic waves, sound waves, and water waves –; and differs from reflection, which involves no change in velocity.
The amount of bending and change in velocity of the refracted wave is due to the amount of dispersion corresponding to the wave's frequency, and the refractive index of the material.
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0006048.html   (756 words)

 Olympus Microscopy Resource Center: Light and Color - Refraction of Light
The effects of refraction are responsible for a variety of familiar phenomena, such as the apparent bending of an object that is partially submerged in water and the mirages observed on a dry, sandy desert.
Refraction by an Equilateral Prism - Visible white light passing through an equilateral prism undergoes a phenomenon known as dispersion, which is manifested by wavelength-dependent refraction of the light waves.
Upon passing through a medium of higher refractive index into a medium of lower refractive index, the path taken by light waves is determined by the incident angle with respect to the boundary between the two media.
www.olympusmicro.com /primer/lightandcolor/refractionhome.html   (925 words)

 Refraction Calculator   (Site not responding. Last check: )
While the light from celestial object is passes throgh the Earth atmosphere it is refracted by the air, the refraction depends on the light path distance, temperature, atmospheric pressure, etc. The net change of the refraction is to lower the apparent altitude of the celestial objects (relative to its geometric position).
The refraction of an object observed at the zenith is 0, while the refraction of an object observed near the horizon is about 34 arcmin.
C, a is the altitude measured in degrees and R is thr amount of refraction measured in degrees.
wise-obs.tau.ac.il /~eran/Wise/Util/Refraction.html   (137 words)

 Refraction of Light
Refraction is the bending of a wave when it enters a medium where it's speed is different.
The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.
The index of refraction is defined as the speed of light in vacuum divided by the speed of light in the medium.
hyperphysics.phy-astr.gsu.edu /hbase/geoopt/refr.html   (383 words)

 Seismic Refraction Versus Reflection
The refraction and reflection of seismic energy at density contrasts follows exactly the same laws that govern the refraction and reflection of light through prisms.
Note that for each seismic ray that strikes a density contrast a portion of the energy is refracted into the underlying layer, and the remainder is reflected at the angle of incidence.
Recent advances in inversion of seismic refraction data have made it possible to image relatively small, non-stratigraphic targets such as foundation elements, and to perform refraction profiling in the presence of localized low velocity zones such as incipient sinkholes.
www.enviroscan.com /html/seismic_refraction_versus_refl.html   (943 words)

 refraction on Encyclopedia.com   (Site not responding. Last check: )
REFRACTION [refraction] in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass.
The index of refraction, n, of a transparent medium is a direct measure of its optical density and is equal to the ratio of the speed of light in a vacuum, c, to the speed of light in the medium: n = c/v.
Refractions on the Pacific Rim: Tongan writers' responses to transnationalism.
encyclopedia.infonautics.com /html/r1/refracti.asp   (789 words)

 Physics 20: Light Refraction - Snell's Law
Refraction is due to a change in the speed of light as it passes from one medium to another.
The angle of refraction (R) is the angle between the normal and the refracted ray.
The ratio of sines of the angles of incidence and refraction is a constant.
www.sasked.gov.sk.ca /docs/physics/u3c12phy.html   (977 words)

 Low Vision Refraction
Refraction is of particular importance in these patients because, for a variety of reasons, they tend to have a high prevalence of uncorrected error.
Refracting the low vision patient is not simply a matter of asking the patient to discriminate clarity between two lenses, but the integration of the following measurements and information which direct the examiner towards the refractive error and finally the lens prescription.
The key to refracting low vision patients is to present the eye with enough of a lens change for the patient to discriminate changes in blur.
www.banjoben.com /low_vision_refraction.htm   (2800 words)

 Snell's Law
Refraction is the bending of the path of a light wave as it passes across the boundary separating two media.
Refraction is caused by the change in speed experienced by a wave when it changes medium.
This study of the refraction of light as it crosses from one material into a second material yields a general relationship between the sines of the angle of incidence and the angle of refraction.
www.glenbrook.k12.il.us /gbssci/phys/Class/refrn/u14l2b.html   (1062 words)

 refraction - Definitions from Dictionary.com
Refraction occurs, as in a lens, when a wave passes from one medium into the second, deviating from the straight path it otherwise would have taken.
Since the index of refraction in most substances depends on the frequency of the wave, light of different colors is refracted by different amounts—hence the colorful rainbow effect of prisms.
Determination of the refractive characteristics of the eye and often the correction of refractive defects with lenses.
dictionary.reference.com /browse/refraction   (920 words)

Refracted ray is the ray of light traveling from the the point of incidence through the second medium.
The angle of refraction, r, is the angle between the refracted ray and the normal
Refraction is also the reason that bodies of water like swimming pools or ponds always appear to be shallower than they really are.
pachome2.pacific.net.sg /~ezzychan/refraction.htm   (566 words)

Refraction does not occur when light passes from blue-colored water to red-colored water because both waters have the same densities.
Refraction occurred when the pencil was leaning and we saw the distortion that indicated so.
When light passes from a substance of lower optical density to a substance of higher optical density the light is refracted at a smaller angle relative to to the normal.
library.thinkquest.org /27066/lightrays/nlrefraction.html   (796 words)

 Mystery of refraction
Refraction is bending of a light beam as it passes from one material into another.
Imortant thing is that the incident ray, the refracted ray and the normal to the surface are all in the same plane (this sentence is called the first law of refraction).
But n is ratio of the sine of the incident ray to the sine of the refracted ray of light as it passes from air into glass, so when it goes in opposite direction the index of refraction is just the inverse of n.
library.thinkquest.org /22915/refraction.html   (2302 words)

 Refraction   (Site not responding. Last check: )
Refraction® offers various types of brushes at different sizes which can be used in several modes for very creative effects.
Refraction® has support for regular layers, as well as Adjustment Layers to adjust brightness, contrast and color balance, Effect Layers to apply light effects, and Fill Layers for color fills, all of them without modifying the layer underneath.
Refraction® features a modular architecture that allows plug-ins to extend the functionality of the program not just with additional filters, but in almost every aspect of the application.
store.purplus.net /refraction.html   (832 words)

The ratio of the sine of the angle of incidence to the sine of the angle of ordinary refraction is a constant.
The index of refraction for the extraordinary ray is a continuous function of direction.
The angle of refraction is the angle between the transmitted ray and the normal.
hypertextbook.com /physics/waves/refraction   (2040 words)

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