Nicol prisms

A half-shadow polarimeter (Lippich type) is illustrated diagram-maticaUy in Fig. Ill, 169, 1. Here two polarized rays are produced by means of the main Nicol prism P and a smaU Nicol prism P the latter... 

In thin sections natural graphite is translucent, strongly pleochroic, and uniaxial. It has a negative sign of birefringence and two extinctions per revolution under crossed Nicol prisms. The atomic number of carbon accounts for its low absorption coefficient for x-rays and electrons. 

Nicol sches Prisma. Nicol prism, nie, adv. never. 

The polarimeter essentially consists of two Nicol prisms, one the polarizer and the other the analyser with a sample tube kept in between them which contains the substance (a liquid or a solution) to be examined. 

Fig. 6. Experimental arrangement for lifetime measurements by the phase-shift method, using laser excitation. The laser beam is amplitude-modulated by a Pockel cell with analysing Nicol prism and a small part of the beam is reflected by a beam splitter B into a water cell, causing Rayleigh scattering. This Rayleigh-scattered light and the fluorescence light from the absorption cell are both focused onto the multiplier cathode PMl, where the difference in their modulation phases is detected. (From Baumgartner, G., Demtroder, W., Stock, M., ref. 122)).

When polymer solids are produced from their melts, the most common structures are these spherulites that can be seen by the naked eye and viewed as Maltese crosslike structures with polarized light and crossed Nicol prisms under a microscope. 

Neutralisation equivalent, determination of, 360, 1071 Nicol prism, 503 Nicotinamide, 850 Nicotinic acid, 848 isoNicotinic acid, 848 Ninhydrin, 436, 993, 994,995 Nioxime, 974, 975... 

Recently, Sato and Hatano 67 69) found a new type of chiral lyotropic mesophase composed of Tween 80, sorbitan mono-9-octadecenoate poly(oxy-l,2-ethanediyl), and water, and discussed the ICD of achiral solute molecules intercalated into the lyotropic mesophase. As the concentration of Tween 80 is increased, three distinct phases are obtained micelle, neat phase, and reversed micelle, in that order. In the region of the volume ratio of Tween 80/(Tween 80 + water) of 0.40 to 0.63 under crossed Nicol-prisms, a focal conic texture was observed. This result indicates that the... 

The polarimeter consists of two Nicol prisms N and Nx (Fig. 43) set at a distance from one another and on a common axis. Nx is the polariser and N the analyser. The polarimeter tube T, containing a definite... 

Nicol prism mounted on circular dial and rotated to give maximum of transmitted light... 

When light is passed through a polarizer such as a calcite Nicol prism, the electric vector is parallel to the plane of polarization. The electric vector transforms in different ways when the polarized light is transmitted through a single crystal of a mineral, depending on its crystal symmetry. 

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