Reading optics diagrams: Glan-Taylor

[pinkfishegg]

Hi everyone. This isn't for a class but more for lab work. I'm confused on how to read optics diagrams to understand this Glan-Taylor prism, specifically the up and down arrow vs the dot. Does the arrow pointing up and down mean that it is vertically polarized. Is the dot horizontally polarized. What is the relation between vertical and horizontal polarization and s and p polarization.

I have the book Hecht optics volume 4 and am looking at it for reference. I see pictures like this a lot but am unsure which part explains the basics of how to read these diagrams. Thanks and happy New Year

 

[Charles Link]

The parallel polarization (electric field component in the plane of incident and reflected rays) is p-polarization, and gets 100% transmission at the Brewster angle, and a partial transmission of the perpendicular (s) polarization. $\\$ If the angle of incidence is past the critical angle though, (it is difficult to tell from this), there will be 100% reflection for both polarizations, except in the case of frustrated total internal reflection. In that case though, I don't know how it affects the two polarization components. $\\$ See https://www.edmundoptics.eu/resources/faqs/optics/polarizers/what-is-the-difference-between-s--and-p-polarization-states/ for definitions.