Temperature white light

Figure 2.40 Light transmission of Styrolution Terlux 2802 TR MASS resin as a function of temperature (white light, thickness of specimen 2 mm) [4].

CCT refers to the appearance of the light generated by a very hot (i.e., incandescent) object, the temperature of which is measured in kelvins (K). As a body is heated, it begins to produce a reddish-yellow, and then a yellow-white light. As temperature increases, the apparent color of the light changes to blue-white. In astronomy, for example, older, cooler... 

Fig. 7. Decrease of room temperature dark conductivity (solid circles) and photoconductivity (solid line) during illumination (the Staebler-Wronski effect) with 200mW/cm2 heat-filtered white light (Steabler and Wronski, 1977).

INCANDESCENCE The emission of light caused by high temperatures white or bright red heat. 

At room temperature magnesium is not attacked hy air. However, when heated it hums with a dazzling white light, forming the oxide, MgO and nitride, MgsN2. The formation of oxide is an exothermic reaction. The heat of reaction causes a portion of the metal to combine with the nitrogen of air ... 

White phosphorus ignites in air spontaneously. When placed on a paper, the paper catches fire after a short delay. It catches fire at about 35°C. At room temperature white phosphorus glows in the dark on exposure to air emitting faint green light. Such chemiluminescence is attributed to the oxidation of P4 molecules in the vapor phase in contact with the surface of solid phosphorus ... 

The presence of incandescent solid or liquid particles in the flame will adversely affect color quality. The resulting "black body" emission of white light will enhance overall emission intensity, but the color quality will be lessened. A "washed out" color will be perceived by viewers. The use of magnesium or aluminum metal in color compositions will yield high flame temperatures and high overall intensity, but broad emission from incandescent magnesium oxide or aluminum oxide products may lower color purity. 

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