Source: https://guthlabs.ai/docs/instruments/telescope-resolving-power-dawes-rayleigh/implementation/

instrument implementation / implementation-contract

# Telescope Resolving Power (Dawes/Rayleigh) implementation

A source-bound implementation contract for Telescope Resolving Power (Dawes/Rayleigh); deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t4-005

**Effect**: Computation or source lookup only

## Input and validation requirements

Zero aperture produces undefined division in both formulas, and the specification does not define automatic selection between Dawes and Rayleigh or make aperture and wavelength units explicit.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "aperture_mm": 50,
    "wavelength_nm": 500
  },
  "expected_outputs": {
    "dawes_arcsec": 2.32,
    "rayleigh_arcsec": 2.516433
  },
  "working": "Dawes: 116 / 50 mm = 2.32 arcsec. Rayleigh: 500 nm = 5.00×10^-7 m; 50 mm = 0.050 m; θ = 1.22 × (5.00×10^-7 / 0.050) = 1.22×10^-5 rad; θ = 1.22×10^-5 × 206265 = 2.516433 arcsec."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/telescope-resolving-power-dawes-rayleigh/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/telescope-resolving-power-dawes-rayleigh/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/telescope-resolving-power-dawes-rayleigh/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche4/tranche4-results.json`