james f Posted February 3, 2011 Report Share Posted February 3, 2011 Hi this is my first post apologies if it's in the wrong forum I would like to know.. for a given constant temperature (say 20 degree c for example)and a constant wavelength of light (choose a normal value), how the refractive index of water varies with density? I am varying density with salinity (table salt) in my lab, does the chemical difference affect the refractive index also? is the change in n due to chemical makeup negligible compared to the change in n due to density. what i would love to see is some data with water varying in density from 1000kg/m3 to 1060kg/m3 plotted against n i've been googling for hours already thank you Quote Link to comment Share on other sites More sharing options...
Qfwfq Posted February 3, 2011 Report Share Posted February 3, 2011 what i would love to see is some data with water varying in density from 1000kg/m3 to 1060kg/m3 plotted against nYou could always rig an optical experiment to measure the index. I don't know where to find the data that you're seeking. I think it's worth bearing in mind that the refractive index is mostly a matter of dielectric constant (effective at the frequency of the EM wave) so it typically has a lot to do with the electric charges in the material. The masses of the atoms involved ought to attenuate the polarization effect at very high frequencies. Because of this, I don't expect it to be a simple dependence on density. I expect adding salt maybe gives a slight increase of refractive index but I don't think it is huge. Quote Link to comment Share on other sites More sharing options...
modest Posted February 4, 2011 Report Share Posted February 4, 2011 You might check here: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA024800&Location=U2&doc=GetTRDoc.pdf Section 4.2 looks like it starts with the data/tables. ~modest Qfwfq and james f 2 Quote Link to comment Share on other sites More sharing options...
Qfwfq Posted February 4, 2011 Report Share Posted February 4, 2011 You might check here:Seems to be exactly what the fella wants! As usual yo da man to mine the web for information about a given thing. Quote Link to comment Share on other sites More sharing options...
james f Posted February 4, 2011 Author Report Share Posted February 4, 2011 You might check here: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA024800&Location=U2&doc=GetTRDoc.pdf Section 4.2 looks like it starts with the data/tables. ~modest that's excellent your google skills put mine to shame. seriously though thank you very much! Quote Link to comment Share on other sites More sharing options...
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