If a photon does not experience time and exists in its full trajectory at a given instant, how does it “perceive” a body moving to cut its path?

Question

OK maybe ELI12 would do.

In: Physics

Answer 1

Taking a step back, nothing can cut a photon’s path, its path ends at its final destination, the destination was determined the instant the photon was released.

The instant the photon was released was the same instant that something blocked its path millions of light-years away, the two timelines are just offset by millions of years.