A teaching tape for LQ-07, Fluorescence Energy Budget and Stokes's Rule
Journey I Stage G: The Fluorescence Energy Accounting
Interactive journey stage examining Stokes's rule, deviation cases, and weak-illumination proportionality.
Open LQ-07 with these settings
Where it starts
| Setting | Value |
|---|---|
| Exciting Frequency ν₁ (nu1) | 850 |
| Emitted Frequency ν₂ (nu2) | 850 |
| Absorbed Quanta k (multiQuantumK) | 1 |
| Absorbed Optical Power (absorbedPowerMicrowatts) | 1 |
| Quantum Yield Y (quantumYield) | 0.5 |
What it changes, and what to expect
Where it starts, before anything changes
Emitted light at the absorbed frequency, where the ledger just balances
The walkthrough opens with the emitted light at the same frequency as the absorbed light, which is the edge of what a single quantum can pay for: the energy going out equals the energy coming in and nothing is left for anything else. Stokes's rule says the emitted frequency does not exceed the absorbed one, and this is that limit rather than a comfortable case inside it. The next step asks for more than the quantum has.
Set Emitted Frequency ν₂ (nu2) to 900 changes what the run starts from
The Single-Quantum Ledger
Single-quantum energy accounting: h*nu1 = h*nu2 + E_other.
What the author recorded that a reader should see here. Quantity Expected Under energyDeficitEv 0.206783 eV modern-si-2019
These are the values the tape's author recorded, not a result this page computed. Nothing here runs the instrument. Open LQ-07 with these settings: the link opens it with them already in place. Compare what it gives you with what is recorded here. The settings travel in the link and the laboratory reads them as it loads, so without JavaScript it opens at its worked example instead.
What these numbers were recorded under
| Identity | Recorded as |
|---|---|
| Model | fluorescence-budget-reference version 1 |
| Seed | 0 |
| Random-stream semantics | version 1 |