Stern–Gerlach Virtual Experiment

Experiment bench

Running

1Experiment step

Your prediction: what will the last device show on the screen?

Pick one before the hits build up.

2Atomic source

Silver atom (Ag)

[Kr] 4d¹⁰ 5s¹ · L = 0 · S = ½ · ²S₁/₂

Atomic beam intensity

atoms/s

A stronger beam only adds impacts; it does not change the spin-up to spin-down ratio.

Impacts kept on the screen

Oven temperature

°C

A hotter oven means faster atoms, less time in the field and a smaller split.

Speed through the selector (v_p ± 1%): 543 m/s

3Stern–Gerlach devices

SG-1

Output to the next device

Field strength B

Field gradient

T/m

Exit paths

Upper pathz+Open

Lower pathz−Blocked

SG-2

Output to the detector

Field strength B

Field gradient

T/m

4Run and record

Show the classical prediction on the chart

5Theoretical outputs

Probability of z+: 100.0%
Probability of z−: 0.0%
Share passing the filters: 50.0%
Selected speed (v_p): 543 m/s
Spot separation (selected speed): 2.11 mm
Zeeman splitting in the last device: 92.7 µeV

The deflection depends only on the field gradient and falls as 1/T; the field strength B only sets the quantisation axis and the Zeeman energy splitting.

Run each step to the end; the missions record your progress.

Impacts on the screen

Recorded impacts
Quantum prediction
Classical prediction

Atom counts at the last output

Spin up z+
Theory: 100%
0
—
Spin down z−
Theory: 0%
0
—

Total impacts: 0

Current status

The incoming state is an eigenstate of the last device's axis: every atom gives one result and the other exit stays empty.

Atoms emitted: 0
Impacts on the screen: 0
Stopped by blockers: 0
Share reaching the screen (theory): 50%
Elapsed time: 0.0 s

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