Visible light spectroscopy

The earliest detector used for visible light spectroscopy was the human eye. There are still spectroscopes and color comparators designed for visual observation of color and intensity. 

The reaction between hydrogen and iodine to form hydrogen iodide was used to illustrate Beer s law in Chapter 14 (Figure 14.5). The reaction can be monitored using visible-light spectroscopy because I2 has a violet color while Hj and HI are colorless. At 300 K, the equilibrium constant for the reaction H2( ) + l2( ) 2HI( ) is = 794. 

The speciation and diffusion of sulfur in nominally dry albite melt at 1300 to 1500C was investigated by analyzing glasses formed in piston-cylinder runs using electron microprobe, micro-Raman, infrared-, UV- and visible-light-spectroscopy. In violet-colored albite glass in which some of the sulfur was S2" and 83", the diffusion... 

Ultraviolet and visible light spectroscopy makes use of the quantized nature of the electronic structure of molecules. One example that is commonly observed by eye is the yellow color of polymeric materials that have been slightly degraded by heat or oxidation. Frequently this is due to the appearance of conjugated double bonds (5). For example, the 10-polyene conjugated structure absorbs light at 473 nm in the blue region. 

Ultraviolet and visible light spectroscopy Sequence length conformation and spatial analysis. (f)... 

Ultraviolet/ Visible Light Spectroscopy, often call absorption spectroscopy, involves SLIDE... 

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