what is phroton..............
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photon is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all light.
Photons are always in motion and, in a vacuum, travel at a constant speed to all observers of 2.998 x 108 m/s. This is commonly referred to as the speed of light, denoted by the letter c.
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Proton is a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron
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