In optics, the refractive index (or refraction index) of an optical medium is the ratio of the apparent speed of light in the air or vacuum to the speed...

Refractive index contrast, in an optical waveguide, such as an optical fiber, is a measure of the relative difference in refractive index of the core...

Negative-index metamaterial or negative-index material (NIM) is a metamaterial whose refractive index for an electromagnetic wave has a negative value...

Gradient-index (GRIN) optics is the branch of optics covering optical effects produced by a gradient of the refractive index of a material. Such gradual...

{n_{2}}{n_{1}}}} Optical prisms and lenses use refraction to redirect light, as does the human eye. The refractive index of materials varies with the wavelength...

tracing to compute the angles of incidence or refraction, and in experimental optics to find the refractive index of a material. The law is also satisfied...

A high-refractive-index polymer (HRIP) is a polymer that has a refractive index greater than 1.50. Such materials are required for anti-reflective coating...

A graded-index fiber, or gradient-index fiber, is an optical fiber whose core has a refractive index that decreases continuously with increasing radial...

well-characterized refractive index, but these indices often depend strongly upon the frequency of light, causing optical dispersion. Standard refractive index measurements...

in particular its refractive index and the extent to which it rotates the plane of linearly polarized light. The refractive index, nD, for sucrose solutions...

Lüneburg-Linse) is a spherically symmetric gradient-index lens. A typical Luneburg lens's refractive index n decreases radially from the center to the outer...

Birefringence means double refraction. It is the optical property of a material having a refractive index that depends on the polarization and propagation...

step-index profile is a refractive index profile characterized by a uniform refractive index within the core and a sharp decrease in refractive index at...

which become optically inaccessible. Matching the refractive index minimises reflection, refraction, diffraction and rotations that occurs at the interfaces...

A refractive index profile is the distribution of refractive indices of materials within an optical fiber. Some optical fiber has a step-index profile...

is refracted in the same direction as the curvature of Earth's surface. The refractive index of air depends on temperature, giving rise to refraction effects...

Standard refractometers measure the extent of light refraction (as part of a refractive index) of transparent substances in either a liquid this is...

The refractive index of water at 20 °C for visible light is 1.33. The refractive index of normal ice is 1.31 (from List of refractive indices). In general...

known "refractive power" (refractive index) to an external medium whose index was to be measured. With this device, Wollaston measured the "refractive powers"...

Experimental data for the real (refractive index) and imaginary (absorption index) parts of the complex refractive index of fused quartz reported in the...

The Sellmeier equation is an empirical relationship between refractive index and wavelength for a particular transparent medium. The equation is used to...

The refractive index of a medium is calculated by dividing the speed of light in vacuum by the speed of light in that medium. The refractive index of vacuum...

transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in...

represents the refractive indices and associated polarizations of light, as functions of the orientation of the wavefront, in a doubly-refractive crystal (provided...

a material is called the refractive index n of the material (n = ⁠c/v⁠). For example, for visible light, the refractive index of glass is typically around...

is the nominal refractive index as a function of distance from the fiber axis, n 1 {\displaystyle n_{1}} is the nominal refractive index on axis, n 2 {\displaystyle...

differential refractometer (DRI), or refractive index detector (RI or RID) is a detector that measures the refractive index of an analyte relative to the solvent...

be assigned a negative refractive index. Such materials are sometimes called "double negative" materials. Negative refraction occurs at interfaces between...

constant refractive index, n, the OPL for a path of geometrical length s is just O P L = n s . {\displaystyle \mathrm {OPL} =ns.\,} If the refractive index varies...

called the quadratic electro-optic (QEO) effect, is a change in the refractive index of a material in response to an applied electric field. The Kerr effect...