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Huygens Principle Of Double Refraction
Huygens principle of double refraction, named after Netherlands, Dutch physicist Christiaan Huygens, explains the phenomenon of Birefringence, double refraction observed in Birefringence, uniaxial anisotropic material such as calcite. When unpolarized light propagates in such materials (along a direction different from the optical axis), it splits into two different rays, known as O-ray, ordinary and Extraordinary ray, extraordinary rays. The principle states that every point on the wavefront of Birefringence, birefringent material produces two types of wavefronts or wavelets: spherical wavefronts and ellipsoidal wavefronts. These secondary wavelets, originating from different points, interact and interfere with each other. As a result, the new wavefront is formed by the superposition of these wavelets. History The systematic exploration of light Polarization (physics), polarization began during the 17th century. In 1669, Rasmus Bartholin made an observation of double refraction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystal On Graph Paper
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their Geometry, geometrical shape, consisting of flat face (geometry), faces with specific, characteristic orientations. The scientific study of crystals and crystal formation is known as crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification. The word ''crystal'' derives from the Ancient Greek word (), meaning both "ice" and "Quartz#Varieties (according to color), rock crystal", from (), "icy cold, frost". Examples of large crystals include snowflakes, diamonds, and table salt. Most inorganic solids are not crystals but polycrystals, i.e. many microscopic crystals fused together into a single solid. Polycrystals inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
