Definition of "photons" [photons]

• Plural form of photon. (noun)

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• "They discovered that light comes in discrete packets, or quanta, which we call photons"
• "Traveling at almost the speed of light (and therefore "relativistic"), these feather weight electrons collide with photons from the cosmic microwave background."
• "Electromagnetic radiation is emitted in discrete units known as photons that travel at the speed of light as electromagnetic waves."