Beer–Lambert Law (Absorbance) Calculator implementation

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

t5-014

Effect

Computation or source lookup only

Input and validation requirements

The zero-path-length input makes the concentration calculation undefined. With the specified plain-arithmetic engine, an unchecked implementation can return Infinity rather than rejecting the input. Unit ambiguity can additionally produce a tenfold concentration error.

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": {
    "A": 0.6,
    "epsilon": 15000,
    "epsilon_units": "L mol^-1 cm^-1",
    "l": 1,
    "l_units": "cm",
    "c": null,
    "c_units": "mol L^-1"
  },
  "expected_outputs": {
    "c": 0.00004,
    "c_units": "mol L^-1"
  },
  "working": "c=A/(εl)=0.600/(15000×1)=0.600/15000=0.0000400 mol L^-1=4.00×10^-5 mol L^-1."
}

Other records

Sources and evidence

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

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json