double refractions การใช้

• Single calcite crystals display an optical property called birefringence ( double refraction ).
• Anyway, DR is short for double refraction, a synonym of birefringence.
• An object viewed through Iceland spar appears as two because of double refraction.
• It is extremely hard and has a double refraction.
• Some solid materials under specific conditions can demonstrate double refractions and optic axes.
• It produces a unique surface glow due to the double refraction of calcite crystals.
• In 1678, Huygens discovered the polarization of light by double refraction in calcite.
• Non-crystalline materials have no double refraction and thus, no optic axis.
• They may exhibit pleochroism or double refraction.
• In other words, because Gananite is an isometric mineral, it does not exhibit double refraction.
• Unlike spinel, taaffeite displays the property of double refraction that allows distinction between these two minerals.
• This is due to double refraction as the light bends twice, when entering and leaving the prism.
• This Maltese cross is because of its liquid-crystalline structure giving it a double refraction ( birefringence ).
• With this double refraction, the two subsidiary images appear as one above and one below the main image.
• He studied reflection was published in 1809 and his theory of double refraction of light in crystals, in 1810.
• A quartz wedge also may be calibrated by determining the amount of double refraction in all parts of its length.
• As the exact nature of the double refraction varies for different crystal structures, phase contrast aids in the identification of minerals.
• Amicite is classified as biaxial anisotropic so the velocity of light varies depending on direction through the mineral, as well as showing double refraction.
• Huygens had experimented in 1672 with double refraction ( birefringence ) in Icelandic spar ( calcite ), a phenomenon discovered in 1669 by Rasmus Bartholin.
• Anisotropic crystals have double refraction of light where light of different polarizations is bent different amounts by the crystal, and therefore follows different paths through the crystal.