photon

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“
Therefore, a method for creating and observing n different orbital states of a photon is also a method for sending and receiving a number between 1 and n using only one photon.

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Definitions (3)

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  1. noun The quantum of electromagnetic energy, regarded as a discrete particle having zero mass, no electric charge, and an indefinitely long lifetime. See Table at subatomic particle.
  2. noun A unit of retinal illumination, equal to the amount of light that reaches the retina through 1 square millimeter of pupil area from a surface having a brightness of 1 candela per square meter.

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Examples (38)

  • As the sound starts to pulse and contract, our physicists can tell when a photon is going to be emitted. —  Demo: Stunning data visualization in the AlloSphere
  • A photon from the Portuguese (or Chinese or Pacific or Kansas) daylight would be directed on its way by means of plasma mirrors operating within the bores, and would reach the fog-bound folk in the farms of the North Atlantic before an eye could bunk. —  The Many-Coloured Land -- Julian May
  • There is a stochastic probability that any quantum particle like a photon or an electron can find itself on the other side of an impermeable barrier. —  F ;SF; - vol 096 issue 03 - March 1999
  • When the electron drops down to a lower energy level, it gives off a particle known as a photon -- a particle of light. —  F ;SF; - vol 100 issue 01 - January 2001
  • For a photon, you might think m = 0 would mean p = 0, but when v = c (the speed of light), gamma = —  Medlogs - Recent stories
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