Recent advancements in understanding photon properties are poised to revolutionize plasma heating techniques in fusion reactors. Researchers at the Princeton Plasma Physics Laboratory have discovered that a photon’s polarization remains unchanged across various materials, offering new insights into light behavior. This could lead to the design of more precise light beams, enhancing the efficiency of plasma heating and measurement in tokamaks, crucial for achieving sustainable fusion energy. The study, led by Hong Qin and published in Physical Review D, also reveals novel insights into photon’s spinning motion, challenging previous assumptions and necessitating a more nuanced theoretical explanation.