But that is different from what YOU see. You see the two photons leave the flashlights at the speed of light (relative to you), but you also see Bertha (and the targets) moving. So while the photons are making their way to their targets, you will see one of the targets move closer to the photons, while the other target moves away from the photons. As a result, you’ll see one of the photons (the left one) hit its target before the other photon reaches the other target.
But that is different from what YOU see. You see the two photons leave the flashlights at the speed of light (relative to you), but you also see Bertha (and the targets) moving. So while the photons are making their way to their targets, you will see one of the targets move closer to the photons, while the other target moves away from the photons. As a result, you’ll see one of the photons (the left one) hit its target before the other photon reaches the other target.
Cham, Jorge. We Have No Idea: A Guide to the Unknown Universe (p. 171). Hodder & Stoughton. Kindle Edition.
