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Refractive index
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In optics, the refractive index, often denoted n, is the ratio of the speed of light in vacuum to the speed of light in a given optical medium, n=c/v. The refractive index determines how much the path
Thomas Young coined the term index of refraction in 1807.
Thomas Young coined the term index of refraction in 1807.
Diamonds have a very high refractive index of 2.417.
Diamonds have a very high refractive index of 2.417.
A split-ring resonator array arranged to produce a negative index of refraction for microwaves
A split-ring resonator array arranged to produce a negative index of refraction for microwaves
In optical mineralogy, thin sections are used to study rocks. The method is based on the distinct refractive indices of different minerals.
In optical mineralogy, thin sections are used to study rocks. The method is based on the distinct refractive indices of different minerals.
Polarization (waves)
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Polarization, or polarisation, is a property of transverse waves which specifies the geometrical orientation of the oscillations. In a transverse wave, the direction of the oscillation is perpendicula
Circular polarization on rubber thread, converted to linear polarization
Circular polarization on rubber thread, converted to linear polarization
Color pattern of a plastic box showing stress-induced birefringence when placed in between two crossed polarizers.
Color pattern of a plastic box showing stress-induced birefringence when placed in between two crossed polarizers.
Stress in plastic glasses
Stress in plastic glasses
Photomicrograph of a volcanic sand grain; upper picture is plane-polarized light, bottom picture is cross-polarized light, scale box at left-center is
Photomicrograph of a volcanic sand grain; upper picture is plane-polarized light, bottom picture is cross-polarized light, scale box at left-center is 0.25 millimeter.