10+ Velocity Of Light Formula In Terms Of Permittivity Permeability. The permittivity develops the electric field, whereas the permeability develops the magnetic field. This works directly in conjunction with maxwell’s equations with c=√(1/µ0ɛ0). PPT Modern Optics I wave properties of light PowerPoint from www.slideserve.com The value of permeability is given by: The table below shows …