Quasars as strong standard candle candidates

This research presents a resolution to Einstein’s general theory about radiation propagation. The answer suggests a coherent state among the photons within a beam. In this condition, the radiation progressively decreases in energy as it traverses intergalactic distances. The effect of extreme gravitational fields, like those found in quasars, on the coherence state of beams of light could help us to learn more about what quasars are like. This discovery reinforces the idea that quasars may function as reliable cosmic-distance indicators after a deeper understanding of their physical characteristics.