stephaneww Posted December 10, 2015 Share Posted December 10, 2015 all is in tthe title thank you very much for your answers Link to comment Share on other sites More sharing options...
swansont Posted December 10, 2015 Share Posted December 10, 2015 The temperature drops because the wavelength increases, in proportion to the expansion of the universe. Wien's law connects the wavelength with a temperature.http://www.phy.duke.edu/~kolena/cmb.htm http://www.cv.nrao.edu/course/astr534/CMB.html Link to comment Share on other sites More sharing options...
stephaneww Posted December 10, 2015 Author Share Posted December 10, 2015 Oh it is good !!! thank you Link to comment Share on other sites More sharing options...
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