double refraction sentence in Hindi
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- If all the sections are of the same thickness as is nearly true of well-made slides, the minerals with strongest double refraction yield the highest polarization colors.
- He succeeded in explaining the colour of thin and of thick plates, and the inflexion of light, and he wrote on double refraction, light polarization and binocular vision.
- Because this mineral possesses birefringence, we know it is anisotropic and will display double refraction; it breaks light into two different rays traveling at different speeds in the mineral.
- Most noted for his contributions to the field of optics, he studied the double refraction by compression and discovered the photoelastic effect, which gave birth to the field of optical mineralogy.
- Kerr's most important experimental work was the discovery of double refraction in solid and liquid dielectrics in an electrostatic field ( 1875 ) and of the so-called Kerr effect.
- The mineral sections when not extinguished are not only bright but are colored and the colors they show depend on several factors, the most important of which is the strength of the double refraction.
- The terms " ordinary " and " extraordinary " are still applied to the polarization components perpendicular to and not perpendicular to the optic axis respectively, even in cases where no double refraction is involved.
- Later, Neumann attacked the problem of giving mathematical expression to the conditions holding for a surface separating two crystalline media, and worked out from theory the laws of double refraction in strained crystalline bodies.
- One of these, " On the Equilibrium of Elastic Solids ", laid the foundation for an important discovery later in his life, which was the temporary double refraction produced in viscous liquids by shear stress.
- In studying double refraction, with his deduction of the elastic constants ( on which the optical properties depend ) Neumann employed the assumption that the symmetry of the elastic behavior of a crystal was equal to that of its form.
- The optic axes emerge at the apices of the hyperbolas and may be surrounded by colored rings, though owing to the thinness of minerals in rock sections these are only seen when the double refraction of the mineral is strong.
- By taking the average, or the highest color given by any mineral, the relative value of its double refraction can be estimated; or if the thickness of the section be precisely known the difference between the two refractive indexes can be ascertained.
- Conceptually different experiments that also attempted to detect the motion of the aether were the Trouton Noble experiment ( 1903 ), whose objective was to detect the experiments of Rayleigh and Brace ( 1902, 1904 ), to detect double refraction in various media.
- In telecommunication, "'magneto-ionic double refraction "'is the combined effect of the Earth's magnetic field and atmospheric ionization, whereby a linearly polarized wave entering the ionosphere is split into two components called the ordinary wave and extraordinary wave.
- The low index of refraction and the feeble double refraction in nepheline are nearly the same as in quartz; but since in nepheline the sign of the double refraction is negative, while in quartz it is positive, the two minerals are readily distinguished under the microscope.
- The low index of refraction and the feeble double refraction in nepheline are nearly the same as in quartz; but since in nepheline the sign of the double refraction is negative, while in quartz it is positive, the two minerals are readily distinguished under the microscope.
- If now it be used to produce compensation or complete extinction in any doubly refracting mineral section, we can ascertain what is the strength of the double refraction of the section because it is obviously equal and opposite to that of a known part of the quartz wedge.
- In 1832, by the aid of a particular hypothesis as to the constitution of the ether, he reached by a rigorous dynamical calculation results agreeing with those obtained by Augustin Louis Cauchy, and succeeded in deducing laws of double refraction closely resembling those of Augustin-Jean Fresnel.
- In addition, a distinct form of double refraction occurs in cases where the optic axis is not along the refracting surface ( nor exactly normal to it ); in this case the electric polarization of the birefringent material is not exactly in the direction of the wave's electric field for the extraordinary ray.
- The difference between the refractive indexes of the ordinary and the extraordinary ray in quartz is . 009, and in a rock-section about 1 / 500 of an inch thick this mineral gives grey and white polarization colours; nepheline with weaker double refraction gives dark grey; augite on the other hand will give red and blue, while calcite with the stronger double refraction will appear pinkish or greenish white.
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