• Question: Why do things glow when they are heated .Ex Melting iron etc.?

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      Asked by Chaos Daemon to Alex, Anaïs, Peter, Sarwat, Shreesha on 10 Mar 2015.
      • Photo: Sarwat Iqbal

        Sarwat Iqbal answered on 10 Mar 2015:

        ll objects are made up of atoms, which vibrate when thermal energy is received. The greater the thermal energy received, the more vigorously the atoms vibrate. One result of these vibrations is the emission of electromagnetic waves. Our eyes can see only a very narrow portion of all the electromagnetic waves; we recognize these waves as the colors from red to violet, with the color depending on the frequency. Violet, having the highest frequency of all visible light, is at one end of the color spectrum, while red is at the other end and has the lowest frequency. White is the sum of all colors.

      • Photo: Shreesha Bhat

        Shreesha Bhat answered on 17 Mar 2015:

        On heating, Electrons excite and are known to go to higher energy levels, when they get back to their original levels, they release energy which you see in the form of glow.

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