Massless Particle Description
"Massless particle" is an awkward translation from mathematics to English. Physicists know exactly what they mean by a massless particle. A "massless particle" is the name they give to an element in a mathematical structure. What that element represents in the real world, however, is not so easy to describe. In fact, it is impossible because the definition of an object (like a "particle") is something that has mass.
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