Fotones de fuente astronómica no variable
photon_random-counting
Photons from a faint, non-variable astronomical source incident on a CCD detector. Because the signal is low in this example, it is easy to see that there is a substantial variation in the number of photons detected in each 1 s time interval. (http://www.vikdhillon.staff.shef.ac.uk/teaching/phy217/detectors/phy217_det_poisson.html)
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