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!

Homework Help: Calculate the rate of energy output of the sun, taking the sun as a blackbody

  1. Aug 17, 2012 #1
    1. The surface temperature of the sun is approximately 5800K. Given that the radius of the sun is 6.96x108m calculate the rate of energy output of the sun, taking the sun as a blackbody.

    2. H = εσAT4



    3. Surface temp = 5800K, Radius of the sun = 6.96x108, Emissivity of a blackbody = 1
    H = εσAT4
    H/A = (1)(6.96x108)(5800)4
    = 7.87x1023W/M2

    Am I right??
     
  2. jcsd
  3. Aug 17, 2012 #2

    lewando

    User Avatar
    Homework Helper
    Gold Member

    No. Question is asking for "the rate of energy output" which is power (watts). You also seem to be confusing radius with σ, Stephan's constant.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook