# 📐 L2 Spec — Mie Scattering — rigorous spherical-particle scattering Mismatch-Only Spec
**ID:** `L2-243-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-243`](/artifact/l1/L1-243)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41553992
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| Snr db | dB | 0 – 40 |
| N angles | — | 18 – 3600 |
| N wavelengths | — | 1 – 50 |
| N complex error | — | 0.0 – 0.05 |
| Concentration error | — | 0.0 – 0.3 |
| Polydispersity width error | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
16.0 + 1.0*log2(N_wavelengths/1) + 0.25*SNR_dB - 40.0*n_complex_error - 10.0*polydispersity_width_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`3ff515a6bb248a3701e8b9ca2cb4672e5ceb0eb000a24696ce3fe27ab6d30321`
## 5. On-chain Registration
- **Chain hash:** `0xb629030d04a2d6e8afcc868829a2287342cf2c3021ea636dad6e6e36b038fe65`
- **Chain tx hash:** `0x8d987611722848e634c5aa0771ceb74a42c8ec9c0ddb3e3dbc1529fce595f987`
- **Chain block:** `41553992`
---
## File Mapping
This bundle consists of: `L2-243-001.md`, `L2-243-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-243-001.md` | Source of truth — edit this | Human or LLM |
| `L2-243-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-243-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._