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A '''photon''' is the smallest amount of visible light. When we "see", our eyes are receiving streams of photons reflected from the objects around us.  In classical physics there was a paradox between the nature of light - whether it was a particle or a wave phenomenon, as it seemed to exhibit the properties of both.  The accepted explanation now is that it is both, and consists of packets or quanta (singular ''quantum'') of a wave. A photon is a single packet.

A '''photon''' is the smallest amount of visible light. When we "see", our eyes are receiving streams of photons reflected from the objects around us.  In classical physics there was a paradox between the nature of light - whether it was a particle or a wave phenomenon, as it seemed to exhibit the properties of both.  The accepted explanation now is that it is both, and consists of packets or quanta (singular ''quantum'') of a wave. A photon is a single packet.