Wavelength, defined

A new application of thermoluminescence (TL) to the study of minerals is described. The intensity of TL light emission as a function of both temperature and wavelength defines a three- dimensional picture which is characteristic of a particular mineral or group of minerals. The apparatus is briefly described together with its application to the study of the physical structure of some alkali feldspars. Examples are given of a K-rich and Na-rich feldspar and a potential method is discussed for identifying the nature of the phases of samples of mixed K/Na composition. 

Another popular approach to wave-particle duality, which originated with Schrodinger, was to view the quantum particle as a wave structure or wave packet. This model goes a long way towards the rationalization of particle-like and wave-like properties in a single construct. However, the simplified textbook discussion, which is unsuitable for the definition of quantum wave packets, relies on the superposition of many waves with a continuous spread of wavelengths, defines a dispersive wave packet, and therefore fails in modelling an electron as a stable particle. 

Blackbody emmissive power per unit wavelength, defined by Eq. (8-12)... 

The wavelength defined in Equation 1.20 is called the de Broglie wavelength of a particle. Equation 1.20 implies that a particle in motion can be treated as a wave and that a wave can exhibit the properties of a particle (that is, its momentum). Thus, the left side of Equation 1.20 addresses the wavelike properties of matter (wavelength), whereas the right side addresses its particle-like properties (mass). 

Waveband A band of wavelengths defined for some given purpose. 

Since for a single, uniform layer the reflectance is minimized at only one wavelength defined by Eq. 2, multilayer films, comprising alternating layers of high and low index (refer to Fig. 38 in Chapter 13), and graded refractive index films have been developed. The reflectance of a solar cell coated with... 

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