Geiger Counter

how it works: - a radioactive particle (wave?) passes through low pressure gas in the tube - the gas gets ionized, - and then it conducts, and clicks! / gets counted

\(\frac{M}{(\frac{1-M}{3500})}\)

\frac{λ^x}{x!}e^-λ $X ∼

λ \operatorname {E} (X)\operatorname {Var} (X)