If iron is heated, it becomes red in colour, why it becomes red in colour ?
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The reason is that heat energy is converted into light energy so when iron is heated it becomes red in colour
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When an Iron bar is heated to a very high temperature, it initiallyg glows red and then it's temperature rises it glows white. Incandesence is heat made visible- the process of turning heat energy into light energy......
As the temperature is raised the peak moves towards and finally into the visible region.
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