Linked Life Data

19582008

Source:http://linkedlifedata.com/resource/pubmed/id/19582008

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
23
pubmed:dateCreated
2009-7-7
pubmed:abstractText
I compute from first principles the local heating rate q (the amount of electromagnetic energy converted to heat per unit time per unit volume) for electromagnetic waves propagating in magnetically and electrically polarizable media. I find that, in magnetic media, this rate has two separate contributions, q(V) and q(S), the first coming from the volume of the medium and the second from its surface. I argue that the second law of thermodynamics requires that the volume contribution be positive and that this requirement, in turn, prohibits negative refraction. This result holds for active or passive media and in the presence of anisotropy and spatial dispersion.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1094-4087
pubmed:author
pubmed:issnType
Electronic
pubmed:day
10
pubmed:volume
16
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
19152-68
pubmed:dateRevised
2009-8-19
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Correct definition of the Poynting vector in electrically and magnetically polarizable medium reveals that negative refraction is impossible.
pubmed:affiliation
Departments of Radiology and Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA. vmarkel@mail.med.upenn.edu
pubmed:publicationType
Journal Article