Tuesday, 26 July 2016

optics - Why do metals only glow red, yellow and white and not through the full range of the spectrum?


Why don't metals glow from red to yellow to green to blue etc.? Why only red, then yellow and then white? Shouldn't all wavelengths be emitted one by one as the temperature of the metal increases?


If some metals do glow at with different colours, could you give me examples of such metals and the reason why this happens in specific cases?




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