Re: [Phys-l] permittivity vs dielectric

[Bernard Cleyet <bernardcleyet@redshift.com>]

On 2011, Dec 22, , at 07:59, Paul Lulai wrote:

> Hello.
> How is the permittivity value of some none

???????

> free space material different from that same materials dielectric constant value?  



The dielectric constant is the relative permittivity (to the "free space" permittivity).

All here,      well maybe nearly all.

http://en.wikipedia.org/wiki/Permittivity



> I'm thinking about capacities, and the dieletric value is included when calculating capacitance with the dimensions of the capacitor, so the dielectric constant doesn't seem to depend on the materials dimensions. 
> I wonder if they are proportional to each other (for a given material), and could be thought of as being the same property.
> Thanks for your help.
>
> P.s. this them brings up a similar question for permiability values.
>
> Thanks for your help.
> Happy holidays.
>
> Paul.


bc   thinks (after a cursory perusal) that wiki page is rather "good", many years after his disst. on that subject.