Geocentric Posted June 27, 2006 Report Share Posted June 27, 2006 # It is said that the velocity of electromagnetic waves in a medium depends upon the mechanical and electrical properties of a medium. Is it true? But the expression to find the velocity of electromagnetic waves in a medium = 1/(M)(E) says that it depends upon the electrical & magnetic properties of a medium. Please clear my doubt. Here M = permeability of medium and E = Permittivity of medium. Quote Link to comment Share on other sites More sharing options...
Tim_Lou Posted June 29, 2006 Report Share Posted June 29, 2006 [math]c=\frac{1}{\sqrt{\epsilon\mu}}[/math]from physicsworld.wolfram.comhttp://scienceworld.wolfram.com/physics/SpeedofLight.html this can be derived directly from maxwell's equations. the thing is, in most materials that light can pass through, the magnetic permeability do not vary that much (glasses and gases usually do not become magnetized), hence in a sense it depends mostly on electric permittivity. Quote Link to comment Share on other sites More sharing options...
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