First ray parallel to principal axis passes through focus after reflection, second ray through centre of curvature reflects back on itself. Image changes from virtual/erected to real/inverted as object moves from infinity to mirror. The six positions thing is technically correct, but honestly, I've only ever drawn the three main ones before my brain glitches out. This whole chapter feels like Naruto's shadow clone jutsu — too many copies, all blurry, and my notes are the one that got hit. I panic-sketched the diagrams so many times last night, my rough book looks like a concave mirror itself, warping my will to live.
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