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It is simply represented as n 2 and is called the absolute refractive index of medium 2. The absolute refractive index n of an optical medium is defined as the ratio of the speed of light in vacuum, c = 299 792 458 m/s, and the phase velocity v of light in the medium, =.
Luneburg's solution for the refractive index creates two conjugate foci outside the lens. The solution takes a simple and explicit form if one focal point lies at infinity, and the other on the opposite surface of the lens. J. Brown and A. S. Gutman subsequently proposed solutions which generate one internal focal point and one external focal ...
Refractive index: n = electromagnetism, optics (speed of light in vacuum over speed of light in a material) Transmittance: T = optics, spectroscopy (the ratio of the intensities of radiation exiting through and incident on a sample)
Standard refractive index measurements are taken at the "yellow doublet" sodium D line, with a wavelength (λ) of 589 nanometers. There are also weaker dependencies on temperature , pressure / stress , etc., as well on precise material compositions (presence of dopants , etc.); for many materials and typical conditions, however, these ...
Mie Scattering from a sphere. x is the wave number times the sphere's radius and m is the refractive index of the sphere divided by the refractive index of the medium. In electromagnetism , the Mie solution to Maxwell's equations (also known as the Lorenz–Mie solution , the Lorenz–Mie–Debye solution or Mie scattering ) describes the ...
The Becke line test is a technique in optical mineralogy that helps determine the relative refractive index of two materials. It is done by lowering the stage (increasing the focal distance) of the petrographic microscope and observing which direction the light appears to move. This movement will always go into the material of higher refractive ...
Refractive index vs. wavelength for BK7 glass, showing measured points (blue crosses) and the Sellmeier equation (red line) Same as the graph above, but with Cauchy's equation (blue line) for comparison. While Cauchy's equation (blue line) deviates significantly from the measured refractive indices outside of the visible region (which is shaded ...
Rayleigh–Gans approximation, also known as Rayleigh–Gans–Debye approximation [1] and Rayleigh–Gans–Born approximation, [2] is an approximate solution to light scattering by optically soft particles. Optical softness implies that the relative refractive index of particle is close to that of