Not as far as I thought
Worse news: My mirror is not only not a sphere, it isn’t even fully polished. For the first time, I got the glass properly clean (lots of running water and soap while soft wiping with thoroughly cleaned wet fingertips, rinsing with distilled water, drip-dried) and gave it the laser test. I shone a red laser pointed down onto the polished surface, and observed two spots: A bright one from the back surface of the glass, and a fainter (but still … Continue reading →

