Home > Term: photon
photon
A discrete "packet" of pure electromagnetic energy. Photons have no mass and travel at the speed of light. The term "photon" was developed to describe energy when it acts like a particle (causing interactions at the molecular or atomic level), rather than a wave. Gamma rays and x-rays are photons.
- Part of Speech: noun
- Industry/Domain: Medical devices
- Category: Radiology equipment
- Company: U.S. HHS
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Creator
- MarkL
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