All I know is that polarization density satisfies two equations(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\[

\begin{array}{l}

\rho _{bound} = - \nabla \cdot \vec P \\

\sigma _{bound} = \vec n_{out} \cdot \vec P \\

\end{array}

\]

[/tex]

This is the divergence and boundary conditions of P.But to determine a vector field uniquely,one need more than those;at least we should know the curl.

So how can we directly measure or calculate from other quantities the polarization density?

Don't tell me that for homogeneous dielectrics,P is proportional to E.That must have been tested by experiments,too.The question is HOW to prove this by experiment.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# How to measure the polarization density

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**