For First Responders · Radiometric Dating
Radiometric Dating for a dosimeter
Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a dosimeter live below — adjust the inputs and watch it respond, right in your browser.
Radiometric DatingLive
reading the atomic clock
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Radioactive isotopes decay at a fixed half-life, so the fraction remaining in a sample is a clock. Measure it and you can read the age: t = half-life × log₂(1/fraction). Carbon-14 dates organic material up to ~50,000 years; uranium-238, with a 4.5-billion-year half-life, dates the oldest rocks and the age of the Earth itself.
Data Inspector
Half-life5.73e+3 yr
Estimated age5.7 thousand yr
Best fororganic remains < 50k yr
Governing equation
Reading this result: About 50% of the Carbon-14 is left, which maps to roughly 1.0 half-lives of elapsed time.
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Frequently asked questions
- Is this good for first responders?
- Yes — this version of "Radiometric Dating for a dosimeter" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.