Ultraviolet light transmission

The above are of course only some of the most common characteristics. Individual materials may have special properties such as photoconductivity, very low coefficient of friction to steel, high dielectric constant, high ultraviolet light transmission and so on. 

OTHER COMMENTS used as a catalyst in the oxidation of sulfur dioxide to sulfur trioxide and alcohol to acetaldehyde used in the manufacture of yellow glass also used as an inhibitor to ultraviolet light transmission in glass and as a depolarizer useful as a developer in photography. 

Lighting. An important appHcation of clear fused quartz is as envelop material for mercury vapor lamps (228). In addition to resistance to deformation at operating temperatures and pressures, fused quartz offers ultraviolet transmission to permit color correction. Color is corrected by coating the iaside of the outer envelope of the mercury vapor lamp with phosphor (see Luminescent materials). Ultraviolet light from the arc passes through the fused quartz envelope and excites the phosphor, produciag a color nearer the red end of the spectmm (229). A more recent improvement is the iacorporation of metal haHdes ia the lamp (230,231). 

Source Ultraviolet light, visible light, infrared radiation, microwaves, radio and TV, power transmission... 

In UV reflected photography, a light source emitting ultraviolet light is directed at the subject which then reflects this radiation into the camera. Visible radiation from the room or reflected from the subject will be absorbed by an ultraviolet transmission filter over the camera lens thereby preventing any visible light from reaching the film. 

In UV fluorescence photography, the fluorescence of a substance excited by UV illumination is captured. The source of ultraviolet radiation filtered with an ultraviolet transmission filter, or excitation filter, is aimed at the subject in a completely darkened room. The subject reflects the ultraviolet light, but can also emit a visible fluorescence. The ultraviolet light is then prevented from reaching the film by a barrier filter that only allows visible light to be transmitted to the film. 

Vigorous stirring is essential for optimum yields. The checkers obtained lower isolated yields (ca. 32-33%) in two runs in which a relatively slow stirring rate was employed. The low yields were probably caused in part by deposition of oil on the surface of the immersion well and the resulting interference with the transmission of ultraviolet light into the solution. 

However, it should be imderstood that many recently developed contact lens materials contain polymers that block the transmission of light in the ultraviolet region. Therefore when an ultraviolet light source, such as a... 

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