For 10 points, name these massless particles that are the quanta of light.
These particles are collided together in the hypothetical Breit-Wheeler process. These spin 1 particles carry a force described by the U(1) symmetry group. Two of these particles are created in the annihilation of an electron and a positron, and they are symbolized by (*) gamma. One of these particles is created with identical properties to the incident one in stimulated emission. Fluorescent materials emit these particles. Their energy is given as Planck's constant times their frequency. For 10 points, name these massless particles that are the quanta of light.
These particles are collided together in the hypothetical Breit-Wheeler process.
photons