1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Colour and Temprature qustion

  1. Aug 17, 2011 #1
    1. The problem statement, all variables and given/known data

    If a surface which glows red hot at 500C , calculate the approximte temperature at which it glows white hot, explaining your reasoning

    2. Relevant equations
    I have no idea .


    3. The attempt at a solution

    Must b something to do relating wavelength and temperature , like wein's law ..

    Any ideas guys?

    Thanks
     
  2. jcsd
  3. Aug 17, 2011 #2

    dynamicsolo

    User Avatar
    Homework Helper

    That does seem like a rather vague problem statement, but they are just looking for an estimate. Think about the shape of the blackbody curve. At 500 C, only the "high-energy" end of the distribution has entered the "window" of the "visible" spectrum, so the surface appears dull red. Where might you shift the peak (in wavelength) so that it is roughly centered in that window? (That would give all of the visible wavelengths similar intensities within roughly a factor of 2 or 3.) About what temperature would Wien's Law say that occurs at?

    Hint: this is the situation for stars that "look white".
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Colour and Temprature qustion
  1. Hey. answer my qustion (Replies: 2)

  2. Coloured Problem (Replies: 3)

  3. Ideal gas law qustion? (Replies: 2)

Loading...