Could you please spot where is the fault in this reasoning? I suspect that some of the relations may not be applicable and needs to be substituted with something else (or I'm just making a gross mistake as usual...):(adsbygoogle = window.adsbygoogle || []).push({});

Speed of light in a material:

[tex]c=\sqrt{\frac{1}{\epsilon\mu}}[/tex]

where permettivity is

[tex]\mu=\mu_r\mu_0[/tex]

and suscettivity is

[tex]\chi_m=\mu_r - 1[/tex]

which describes the magnetization of the material due to an external magnetic field

[tex]M=\chi_m H[/tex]

-------------------------

A superconductor behaves like a perfectly diamagnetic material, suppressing the internal field B because

[tex]\chi_m = - 1[/tex]

[tex]M=-H[/tex]

therefore

[tex]\mu_r = 0[/tex]

[tex]\mu = 0[/tex]

[tex]c=infinite[/tex]

which clearly makes no sense...

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# Speed of light in a superconductor

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