[alloysteel]

It is not called a “mirror universe” for nothing, you know. Light rays reflect at angle of incidence, and the exact same light rays come back at the complement of that angle. Simple physics and mathematical computation. No magic is involved.

[know.your.why]

Simple physics and mathematical computation...

Yeop. That was in the last few chapters of Physics 103 for me -Optics. Physics was my absolute favorite course in first year engineering studies. Statics/Dynamics was really fun to. The wash-out math was just ok. I disliked chemistry...but the women doing medical studies had to also take it so that made it a little more fun,