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<blockquote data-quote="Rosco..Jones" data-source="post: 47668" data-attributes="member: 2729"><p>Ren, I'm disappointed with your response. I was hoping for a discussion, not just a few blanket statements that are absolutes.</p><p>Yes, Planck's law has problems with extremely close proximity. Experimental methods and technology has greatly changed since Max's time. Understandings change as we continue to learn. Even though I do agree with your statements, nothing here addresses the points I was looking to here your views upon. Thanks anyway.</p><p></p><p>Planck's law of thermal radiation is limited to equilibrium systems that have a definite temperature and do not carry any heat flux. Here we extend it to steady-state systems with a constant heat flux. The obtained formulas explicitly describe the spectrum of thermal radiation in every direction and provide a sound basis for the self-consistent analysis of radiative heat transport across interfaces, gaps, layered and other important structures. 29 JUN 2011</p><p></p><p>The new findings could have "a broad impact," says Shen. People working with devices using small separations will now have a clear understanding that Planck's law "is not a fundamental limitation," as many people now think, he says. But further work is needed to explore even closer spacings, Chen says, because "we don't know exactly what the limit is yet" in terms of how much heat can be dissipated in closely spaced systems. "Current theory will not be valid once we push down to 1 nanometer spacing." <span style="color: #888888"><a href="http://www.physorg.com/archive/29-07-2009/" target="_blank"><span style="color: #888888">July 29, 2009</span></a></span></p></blockquote><p></p>
[QUOTE="Rosco..Jones, post: 47668, member: 2729"] Ren, I'm disappointed with your response. I was hoping for a discussion, not just a few blanket statements that are absolutes. Yes, Planck's law has problems with extremely close proximity. Experimental methods and technology has greatly changed since Max's time. Understandings change as we continue to learn. Even though I do agree with your statements, nothing here addresses the points I was looking to here your views upon. Thanks anyway. Planck's law of thermal radiation is limited to equilibrium systems that have a definite temperature and do not carry any heat flux. Here we extend it to steady-state systems with a constant heat flux. The obtained formulas explicitly describe the spectrum of thermal radiation in every direction and provide a sound basis for the self-consistent analysis of radiative heat transport across interfaces, gaps, layered and other important structures. 29 JUN 2011 The new findings could have "a broad impact," says Shen. People working with devices using small separations will now have a clear understanding that Planck's law "is not a fundamental limitation," as many people now think, he says. But further work is needed to explore even closer spacings, Chen says, because "we don't know exactly what the limit is yet" in terms of how much heat can be dissipated in closely spaced systems. "Current theory will not be valid once we push down to 1 nanometer spacing." [COLOR=#888888][URL='http://www.physorg.com/archive/29-07-2009/'][COLOR=#888888]July 29, 2009[/COLOR][/URL][/COLOR] [/QUOTE]
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