Analysis of information sources in references of the Wikipedia article "Poisson distribution" in English language version.
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Similarly, if candidates arrive at an enrolment center uniformly, the times between their arrivals will be distributed exponentially, and the number of candidates arriving each hour will follow a Poisson distribution.
The expected values are given by the Poisson model.
The division of light into discrete photons means that nominally constant light sources – e.g. a light bulb or a reflecting object in a scene – will produce visual inputs that vary randomly over time. These variations are described by Poisson statistics.
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The actual number of decays over a period of time is generally described by the Poisson distribution.