index of refraction


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index of refraction

[′in‚deks əv ri′frak·shən]
(optics)
The ratio of the phase velocity of light in a vacuum to that in a specified medium. Also known as absolute index of refraction; absolute refractive constant; refractive constant; refractive index.
References in periodicals archive ?
Hence, we find that the index of refraction is a measure of the inhomogeneity of the medium.
It is seen that due to the polarization the index of refraction of the vacuum can be increased by--0.1-1% for the ratio of the phenomenological constants to be in a range of [a.sub.0]/b = [10.sup.-8] - [10.sup.-6] [K.sup.-1], which could lead to -2-3% weight loss for a sample as shown in [12].
We have the shifts of the frequency density to the space variable on the left hand side while the index of refraction is on the left hand side.
If we include in the transmittance term the interreflections of the light in the window, and we also include the index of refraction of air ([n.sub.a]), Eq.
Second, because its domain of application and limitations are most appropriate for a system such as HPP dispersed in a polymer resin: i.e., one possessing a quasi-spherical structure, narrow polydispersity in size, and a reasonably low relative index of refraction with the non-absorbing surrounding medium.
The dielectric constant [epsilon] is related to the index of refraction n by [epsilon](z) = [n.sup.2](z).
In through-transmission mode, the index of refraction (n) could be obtained from the following as shown in Figure 4:
The reflectance of the luminaire was set to 90 percent and the index of refraction of the prism was set to 1.491, respectively.
Numerical simulations were performed as a function of the filling fraction and the relative index of refraction, nY defined as the ratio between the index of refraction of the scatterers and the surrounding media noted n and n0.
We assume waveguides free from losses, small variations of the index of refraction and propagation along the z axis of the form exp[j([omega]t - [beta]z)].
London, July 11 (ANI): Scientists have built optical nanostructures that enable them to engineer the index of refraction and fully control light dispersion.
With single-sided applications, it also enables perfect index of refraction (RI) matching between air and glass, while avoiding RI mismatch at the glass and EVA interface seen on double-sided coatings.

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