Ref. “Optical Materials”
... This light is incident upon a sample surface at a specified angle. The reflected light is then detected through an analyser (Glan-Thomson calcite prism) and both the polarizer and the analyser angles are varied to find the maximum extinction of the reflected light. The values obtained consist of the ...
... This light is incident upon a sample surface at a specified angle. The reflected light is then detected through an analyser (Glan-Thomson calcite prism) and both the polarizer and the analyser angles are varied to find the maximum extinction of the reflected light. The values obtained consist of the ...
Human Vision: Electrophysiology and Psychophysics
... Several biological visual systems include one or several lenses ...
... Several biological visual systems include one or several lenses ...
Refractive index
... medium. We distinguish between the relative and absolute refractive index. The absolute refractive index is defined as a ratio of the speed of light in vacuum and in selected medium. Generally, the refractive index depends on the wavelength of incident light. Relative refractive index is defined as ...
... medium. We distinguish between the relative and absolute refractive index. The absolute refractive index is defined as a ratio of the speed of light in vacuum and in selected medium. Generally, the refractive index depends on the wavelength of incident light. Relative refractive index is defined as ...
P5G
... P5G Refraction Light waves change speed when they pass across the boundary between two substances with different densities, such as air and glass. This causes them to change direction and this effect is called refraction. ...
... P5G Refraction Light waves change speed when they pass across the boundary between two substances with different densities, such as air and glass. This causes them to change direction and this effect is called refraction. ...
Introduction to light 2
... Dispersion and Refractive Index For the normal dispersion of the refractive indices, the index of refraction decreases with increasing wavelength. To describe the dispersion of a particular material it is necessary to report the index of refraction at several wavelengths. By convention indices of r ...
... Dispersion and Refractive Index For the normal dispersion of the refractive indices, the index of refraction decreases with increasing wavelength. To describe the dispersion of a particular material it is necessary to report the index of refraction at several wavelengths. By convention indices of r ...
Dispersion staining
The optical properties of all liquid and solid materials change as a function of the wavelength of light used to measure them. This change as a function of wavelength is called the dispersion of the optical properties. The graph created by plotting the optical property of interest by the wavelength at which it is measured is called a dispersion curve.The dispersion staining is an analytical technique used in light microscopy that takes advantage of the differences in the dispersion curve of the refractive index of an unknown material relative to a standard material with a known dispersion curve to identify or characterize that unknown material. These differences become manifest as a color when the two dispersion curves intersect for some visible wavelength. This is an optical staining technique and requires no stains or dyes to produce the color. Its primary use today is in the conformation of the presence of asbestos in construction materials but it has many other applications.