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!

EM waves and blackbody radiation question

  1. Nov 28, 2012 #1
    1. The problem statement, all variables and given/known data
    A rectangular metal plate measures 0.20 m long and 0.3 m wide. The plate is heated to a temperature of 1,433 K by passing a current through it. Assuming that it behaves like a blackbody, how much power does the plate radiate under these conditions?


    2. Relevant equations
    P∝T^4 (power is proportional to the temperature raised to the fourth power)
    Only relevant equation I can find in my text book so far. I don't where to factor in the lengths in the question.

    3. The attempt at a solution
    Ive tried all sorts of combos of the equation i gave, but all of them are wrong. I have the same question with different numbers and the answer to that one but still dont know how to get it.ψ
     
  2. jcsd
  3. Nov 28, 2012 #2
    Ok you might not heard about stefan boltzman law
    P=σAT4.(where A is surface area:smile:)
    Where σ is called stefan boltzman constant its value is 5.670373(21)×10−8 W m−2 K−4.
    Now find it it is easy.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: EM waves and blackbody radiation question
  1. Em radiation question (Replies: 1)

  2. EM plane wave question (Replies: 4)

  3. EM Wave questions (Replies: 0)

Loading...