Because “each photon interferes only with itself” (Dirac), the photons detected by this array must have had lateral extensions of at least 100 m. Radio photons, having longer wavelengths, can be far larger than 100 m. The Very Large Array near Socorro, New Mexico, in the United States, is the world’s largest radio telescope array. It stretches along a 36-kilometer line, and demonstrates the interference of radio photons over this distance, verifying that photons can be 36 kilometers wide.
