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Temperature and color - why hot objects glow red?

  1. Jun 17, 2007 #1
    Is there any reason why most hot things alost always begin to get the tinge of red??
  2. jcsd
  3. Jun 17, 2007 #2
    hi mehrzad...yeah there is a reason...it is related to their thermic radiation spectrum...when you heat up an object like a piece of iron...it will emit higher energetic radiations...from Infra-Red it changes to Red...then Orange...Yellow...White...Blue...UV...and so on

    (wavelength peak)=(B)/(Temperature)----┬╗for a blackbody
  4. Jun 17, 2007 #3


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  5. Jun 17, 2007 #4
    if you want to know more about this branch of thermodynamics...look for ultraviolet catastrophe, it's interesting
  6. Jun 18, 2007 #5
    Remember red is cold and blue is hot. I still don't recomend touching a piece of steel that is red.

    CraigD, AMInstP
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