“‘That’s a picture of me when I was younger.’ Yeah, no shit. Every picture of you is a picture of you when you were younger.”

-Mitch Hedberg

You don't even need a mirror, just look at your hands or feet or whatever, that's what your hand or foot or whatever looked like 2 or 3 nanoseconds ago.

True true. Heck it takes some 100-150ms for your brain to register what your eyes have seen.

So you are saying, I always looking younger in the mirror?

That's highly unlikely basically because of the inverse square law. Even tightly focused beams dissipate quite effectively over light-hours, let alone light years. We'd be lucky to catch a single photon from our past selves over any significant distance.

For reference, look up how weak the signal is even just coming back from the moon when people try to hit the retroreflectors with lasers. Or how crazy weak the signals are when they reach Voyager.

Oops, that's right!