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...

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

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

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...

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

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

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...

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...

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

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...

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...

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

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

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...

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

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...

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...

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...

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

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...

and evolution. Some of the properties and techniques used include: Refractive index Birefringence Michel-Lévy Interference colour chart Pleochroism Extinction...

traveling between media of different refractive indices may both reflect and refract at the interface. The refractive index will typically alternate over a...

solids used for making lenses have refractive indices between 1.4 and 1.6; only a few rare materials have a refractive index of 2 or higher (cubic zirconia...

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

between the speed of light c and the phase velocity vp is known as the refractive index, n = c / vp = ck / ω. In this way, we can obtain another form for group...

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...

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

interface between a medium with refractive index n1 and a second medium with refractive index n2, both reflection and refraction of the light may occur. The...

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...

efficiency of photovoltaic cells. The refractive index of silicon is 3.96 (at 590 nm), while air's refractive index is 1.0002926. In general, a flat-surface...