Heating Metal (2 of 3)

Heating Metal (2 of 3)

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Credit: Ted Kinsman/SCIENCE PHOTO LIBRARY

Caption: An iron rod is heated with a torch. The iron in the metal changes colour from red to white as the temperature rises, in a process called thermionic emission of light. The colour of the light given off by the top metal is called the colour temperature. Image 2 in a series of 3.

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Keywords: before and after, chemical, chemistry, colour temperature, demo, energy, fe, glowing, glows, heat, hot, image series, industry, iron, light, metal, orange, photo series, photons, physics, process, serial, series, temperature, thermionic, thermionic emission, time lapse

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