Radioactivity & Half-Life

N(t) = N_0 (1/2)^{t/t_{1/2}}

Half-life10 years

Elapsed time0 years

Half-lives elapsed0.00

Remaining100.0%

Half-life (years)10

Elapsed time (years)0

Set half-life = 5 and elapsed time = 5 — confirm 50% remains (exactly one half-life)
On the same half-life of 5, push elapsed time to 10 — confirm 25% remains (two half-lives)
Set half-life = 8 and elapsed time = 24 — confirm 12.5% remains (three half-lives)
Set half-life = 10 and find the elapsed time at which exactly 25% remains
Set half-life = 2 and elapsed time = 10 — see how much faster a short half-life decays (about 3% remaining)