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A photon can also be a representation of a particle of light or other electromagnetic radiation.
When you are changing energy levels (n), the difference in energy is given off as a photon when you are moving from a high energy electron to a lower energy level. This represents the principle of conversation of energy.
A photon is the basic unit of all light and the smallest discrete amount or quantum of electromagnetic radiation. It's the force carrier of the electromagnetic force. Additionally, photons are always in motion.
Since a photon does not have mass, is it better to think of a photon as a concept/idea that can be assigned an amount of energy rather than a specific 'particle' that you can visualize like a proton or an electron? not sure if this makes sense
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