Polarisation and surface charge: why does σ = P⋅n?

Introducing the polarisation vector in dielectric materials and understanding the relationship between polarisation and surface charge density.
About me: I studied Physics at the University of Cambridge, then stayed on to get a PhD in Astronomy. During my PhD, I also spent four years teaching Physics undergraduates at the university. Now, I'm working as a private tutor, teaching Physics & Maths up to A Level standard.
My website: benyelverton.com/
#physics #mathematics #electromagnetism #dielectric #electricfield #electricdipole #dipole #dipolemoment #dielectrics #insulator #materials #polarisation #polarization #vector #electrostatics #maths #math #science #education

[@TheJara123]

Neat pace and clear presentation

[@pedrorebelo9445]

great video! Ive been all day trying to understand this concept! Thank you!

[@DrBenYelverton]

Thanks, I'm glad this helped!

[@mingmiao364]

Lovely. Back to basics!

[@DrBenYelverton]

I do always enjoy revisiting these things and making sure I can still derive the important equations!

[@ziggle314]

Nice explanation. Brings me back to my EE courses on fields.

[@DrBenYelverton]

Thanks - good memories, I hope!

[@MissPiggyM976]

Very insightful, thanks !

[@DrBenYelverton]

Thank you!

[@PhysicsMath-my3cj]

Hey thanks for this wonderful video ❤

[@DrBenYelverton]

Glad you enjoyed it!