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Relative permittivity

Posted May 7, 2015, 9:46 a.m. EDT 2 Replies

Nina Sterlikova
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Hi, everyone!
I am confused with a way COMSOL defines relative permittivity. I suspect that permittivity acts as susceptibility (according to equations). I attached description of the question in attached pdf file.
I know, it is a very basic stuff (
i would be glad if someone will explain what i am getting wrong.
Cheers,
Nina.
2 Replies Last Post May 9, 2015, 7:16 a.m. EDT
Daniel Connelly
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Posted: 9 years ago May 8, 2015, 4:42 p.m. EDT
In SI units: relative permittivity is 1 for vacuum. It is normalized to ϵ₀, so is unitless, as opposed to the absolute permittivity, which has units.

If you're using CGS units it's a bit different.
In SI units: relative permittivity is 1 for vacuum. It is normalized to ϵ₀, so is unitless, as opposed to the absolute permittivity, which has units. If you're using CGS units it's a bit different.
Nina Sterlikova
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Posted: 9 years ago May 9, 2015, 7:16 a.m. EDT
Hi, thanks for response!
I understood what i got wrong.
Hi, thanks for response! I understood what i got wrong.

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