Typically true random stuff like geiger counters do not have enough entropy in a single reading to be a true secret. They are statistically predictable and produce a curve of data.
By using it to seed a pseudo random number generator you are making the values come out in a completely flat distribution. The geiger counter adds non-deterministic results while the pseudo random number generator adds entropy.
By using it to seed a pseudo random number generator you are making the values come out in a completely flat distribution. The geiger counter adds non-deterministic results while the pseudo random number generator adds entropy.