Talk:Plane of incidence

Need a diagram
The article needs a diagram, perhaps something like the one at the right. I looked quickly through Commons but didn't find a good reflection diagram in English, which emphasizes the plane of incidence.--Srleffler (talk) 01:28, 16 July 2014 (UTC)

Vertical plane?
I don't see how the link to Vertical plane in the See also section is relevant. Vertical planes are defined by their orientation with respect to gravity. Gravity has nothing at all to do with the orientation of the plane of incidence in optics. I removed the link, but was reverted, so I'll ask the question here before reverting again. --Srleffler (talk) 02:13, 25 September 2018 (UTC)