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Black body radiation

  1. Mar 5, 2015 #1
    Will a body of given emissivity kept inside a perfect black body start behaving as a perfect black body?
     
  2. jcsd
  3. Mar 5, 2015 #2

    DrClaude

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    Why should it?
     
  4. Mar 5, 2015 #3
    I meant the whole system black body having a normal body inside it
     
  5. Mar 5, 2015 #4

    DrClaude

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    Are you looking at the blackbody from the outside, or are you interested in the behavior of the grey body inside?
     
  6. Mar 5, 2015 #5
    Can you please answer it for both
     
  7. Mar 5, 2015 #6

    DrClaude

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    What do you think?
     
  8. Mar 5, 2015 #7
    I am actually confused.The actual question that my teacher asked was that if I coat a normal ball with lamp black will it start behaving as a perfect black body
     
  9. Mar 5, 2015 #8

    DrClaude

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    Then go back to the definition of a black body, and think what happens if you look at the painted ball from the outside. Does it behave like a blackbody?
     
  10. Mar 5, 2015 #9
    A black body is the body that absorbs all radiations falling on it so when a electomagnetic radiation is directed towards the ball the lamp black will absorb it so the ball must behave like a black body.
    Am I correct?
     
  11. Mar 5, 2015 #10

    DrClaude

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    Yes.
     
  12. Mar 5, 2015 #11
    Thanks a lot!
     
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