Light visible spectrum

A clever adaptation of a special kind of fluorescence where the energy source is a chemical reaction is called chemiluminescence. The common firefly uses such a reaction to generate light in the green-yellow end of the visible light spectrum. The reaction involves an... 

Selecting an approach If available, a CO-Oximeter, an instrument used to test human blood by measuring its UV-Visible light spectrum, would be ideal. If unavailable, a standard UV-Vis will be used. 

Another direction of investigation is to extend the nanotube array architecture to other metal oxides, most noticeably a-Fc203 and mixed FeTi oxides, to develop materials capable of efficiently responding to the visible light spectrum, while maintaining the outstanding charge transport properties demonstrated by the HO2 nanotube arrays. 

Silver halides are naturally sensitive to ultraviolet and blue light only. That it is possible to photograph objects of all colours is the consequence of the discovery, made in 1873, of the means of extending the sensitivity of silver halides into regions of the visible light spectrum beyond the blue. This was achieved by the addition of a dye in a small amount to a silver halide emulsion which was thereby rendered sensitive to the light absorbed by the dye (1873CB1302). 

Cadmium pigments are semiconductors. Their color is determined by the distance between the valence and conduction bands in the crystal lattice. The high color purity of the pigments is due to the steep reflectance spectra (Figure 3.9), compare also Figure 3.10 in Section 3.3. They cover a wide color range of the visible light spectrum. 

Consider the following approximate visible light spectrum ... 

Examination of curves of sample optical density demonstrated that when the NS concentration was 1% from polycarbonate mass, the visible-light spectrum was absorbed by about 4.2 per cent more when compared with the reference sample. When the nanocomposite concentration was 0.1 percent, the absorption decreased by 0.7 per cent. When the concentration was 0.01 per cent, the absorption decreased in the region 540-600 nm by 2.3 per cent, and in the region 640-960 nm - by 0.5 per cent. 

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