Monochromatic wavelength

The absorptivity is a fundamental property of a molecule at a specified monochromatic wavelength. It has two connotations in European usage, and a third according to American convention. If the concentration is expressed in mol/litre, then k is described as the molar absorptivity (e, litre/moFcm), and defined as The absorbance of a one molar solution in a cell of 1 cm path-length . It may also be quoted as the logarithm (base 10), the values being in the range 1 to 5. 

X-rays, electrons, and neutrons all have wavelike as well as particle nature, and each can be generated as a beam of a very limited energy (and therefore of a specific, or monochromatic, wavelength). X-rays and electrons are scattered when they hit electrons, and neutrons are scattered when they hit nuclei. If these electrons and nuclei are arranged in the three-dimensional regular array of a crystal lattice, scattering takes place only in specific directions that is, diffraction occurs. 

D7039 Monochromatic wavelength dispersive XRF Gasoline and diesels New method little field experience... 

FIG. 1—Principle of Monochromatic Wavelength Dispersive XRF for sulfur analysis. 

Maltenes, 51 Mercury, 181, 196, 207 volatile, 181 Microflow nebulizer, 51 Microwave digestion, 33 Monochromatic wavelength dispersive x-ray fluorescence, 116... 

Lasers emit a beam of intense electromagnetic radiation that is essentially monochromatic or contains at most a few nearly monochromatic wavelengths and is typically only weakly divergent and easily focused into external optical systems. These attributes of laser radiation depend on the key phenomenon which underlies laser operation, that of light amplification by stimulated emission of radiation, which in turn gives rise to the acronym LASER. 

Figure 7.13 Absorption spectra of [a] PEDOT-RGO and (b) PEDOT-ILFG nanocomposite Aims recorded under different dc potentials in the IL. Change in optical density versus inserted charge density plots for [c) PEDOT-RGO and [d] PEDOT-ILFG nanocomposite films at a monochromatic wavelength of 550 nm. Insets of (c) and (d) are the same films in dark [-2.0 V] and pale (+1.0 blue states. Reprinted with permission from Ref. [99]. Copyright 2011, American Chemical Society.

Solid State Dye-Sensitized Solar Cell, Fig. 2 (left) JV characteristics of the highest efficiency reported SDSSC and (right) its corresponding incident photon-to-electron conversion efficiency spectrum as a function of monochromatic wavelength. The right axis of the graph... 

A required spectral (UV and/or VIS) range can be selected from the emitted radiation of a lamp, with the help of transmittance (band pass edge) filters (Fig. 10.12) (solid or liquid). Monochromatic wavelengths can only be obtained with the use of interference solid filters, which are designed separately for the UV region (Fig. 10.13) and visible region (Fig. 10.14), or by monochromators. 

During ignition testing of several polymeric materials, it was found that the surface reflectance/absorptance characteristics had a definite Influence on the time of ignition. Since several of the polymers were either transparent or translucent, the monochromatic surface reflectance/absorptance had to be adjusted to account for energy transmittance. As a result, reflectance and transmittance measurements were made over the monochromatic wavelengths of 0.3 - 10.0 microns. Average values of reflectivity and transmissivity were calculated by... 

Other past studies of several radiant sources have yielded information on the variation of radiation intensity with monochromatic wavelength ". Figure 1 illustrates the emissive powers of solar, tungsten lamp, and hexane flame radiation. The manufacturer of the tungsten lamp indicated that the emissive power of the lamps is essentially that of a blackbody at 2500 K, it provides a maximum peak at 1.15 microns 12. The spectral emissive power of the hexane flame and other hydrocarbons was measured by Ryan,... 

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