How to complete the task
- Measure anywhere: press E / Sample. Each 5-s reading is pinned on the map at the spot you took it (with overlap-avoidance).
- Use lead tiles to reduce dose while you do the maths. Not all categories appear each run.
- When near a source, choose V/W/X/Y/Z and Place Label. Repeat for all sources.
- Press Submit Labels: correct labels are secured. If any label is wrong, you get a penalty and we show which ones need work and why.
Game half-lives:
V ≈ 60 s
W ≈ 240 s
X ≈ 120 s
Y ≈ 360 s
Z ≈ 720 s
Lab Status
Geiger Count (CPM)
0
Cumulative Dose (mSv)
0.000
Dose Limit (mSv)
0.400
Time
00:00
Sources Secured
0 / 3
Controls: WASD/Arrows move · Space Geiger · E sample · R restart
Measurements & Labels
| # | t (s) | x,y (m) | Rate (cpm) |
|---|
OCR A Links
- Exponential decay \(N=N_0 2^{-t/T_{1/2}}\) and counting statistics.
- Inverse-square law; background; shielding (lead floor tiles).
- Practical: isolate a source for a clean half-life estimate.