= Assuming a spherically uniform distribution of total charge q over a radius R, show that...

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= Assuming a spherically uniform distribution of total charge q over a radius R, show that the electronic polarizability is approximately given by a 4EORq. Given that dielectric breakdown sets in most materials typically at electric fields of the order of 108 Vm-1, estimate the intensity of optical fields at which this would occur. = Assuming a spherically uniform distribution of total charge q over a radius R, show that the electronic polarizability is approximately given by a 4EORq. Given that dielectric breakdown sets in most materials typically at electric fields of the order of 108 Vm-1, estimate the intensity of optical fields at which this would occur.