Poisson and Normal Distributions
Poisson Assumptions 1. The probability of one photon arriving in ∆τ is proportional to ∆τ when ∆τ is very small. P(1;∆τ)=a∆τ for small ∆τ where a is a constant whose value is not yet determined. 2. The probability that more than one photon arrives in ∆τ is neg- ligible when ∆τ is very small. P(0;∆τ)+P(1;∆τ)=1 forsmall∆τ 3. the number of photons that arrive in ...
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