How to know that scattering particles are polarised or unpolarised

https://www.toppr.com/content/story/amp/polarization-by-scattering-27424/

Unpolarized light passing through a fluid is scattered; the scattered light being partially or completely plane polarized. For scattering by particles of comparable size to the wav...

like neutron will not interact the daughter particle or proton will do bcoz of charge, while e will show only coulambian interaction.

and dear partie interaction will tell us that which type of polarization that scattered particles have.

Unpolarized light passing through a fluid is scattered; the scattered light being partially or completely plane polarized. For scattering by particles of comparable size to the wav...