[aptitude_moo]

Not entirely sure what time reflection is, but I'm pretty sure it doesn't mean anything related to anything going backward in time. Here I think it's explained better https://spectrum.ieee.org/time-reversal-interface

Edit: Now that I've read a bit more, it seems to me this is just reflecting light back but "all at once". Like if a light signal were a train going right and the first wagon is A (>>>[D][C][B][A]>>>), a normal mirror would make it bounce and the train would go back going left and wagon A arrives first (<<<[A][B][C][D]<<<). A """time reflection""" would make the train return backwards and wagon D arrives first like this (<<<[D][C][B][A]<<<). I understand it is like reflecting each wagon at the same time so the train comes back reversed. This looks cool but I think the article deliberatively makes it confusing so it sound like the movie TENET when it starts talking about entropy

[plusplusungood]

Really going above and beyond on that, "write a function that reverses a string in place" interview question, aren't they? I'm afraid I'll have to dock points in simplicity though.