Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    malawi_glenn

    User Avatar
    Science Advisor
    Homework Helper

    http://en.wikipedia.org/wiki/Black_body

    http://en.wikipedia.org/wiki/Planck's_law_of_black_body_radiation
     
  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
    www.cymek.com
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Temperature and color - why hot objects glow red?
  1. Red-hot materials (Replies: 11)

  2. Hot objects (Replies: 10)

Loading...