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A property of a material that changes the speed of light, computed as the ratio of the speed of light in a vacuum to the speed of light through the material. When light travels at an angle between two ...

A superlattice comprising alternating layers of negative-refractive-index photonic crystals and positive-refractive-index dielectric media has been shown to exhibit an effective refractive index of ...

The first law of refraction states that the incident rays, refracted rays, and the normal to the interface at the point of incidence, all lie in the same plane. The ratio of the sine of the angle of ...

Physics the speed at which the phase of a wave is propagated, the product of the frequency times the wavelength. This is the quantity that is determined by methods using interference. In a dispersive ...

We find the definition of “subjective refraction” as proposed by Dr. Louis Catania in his commentary, “Delegating refraction: technician collects data, doctor performs subjective refraction” ...

A new dual-light microscope lets researchers observe micro- and nanoscale activity inside living cells without using dyes.

Biotech Fluidics announces REFRACTiMASTER® - a new HPLC refractive index (RI) detector suitable for detecting compounds with little or no UV activity including simple sugars, complex carbohydrates, ...