Source: https://guthlabs.ai/docs/instruments/time-dilation-calculator/

instrument / verified-clean

# Time Dilation Calculator

The current ledger marks this instrument verified clean within the source-bound verification corpus.

Status: **VERIFIED_CLEAN**Lifecycle: **verified-clean**

## Inspectable records

[01**Overview**Purpose and lifecycle](<https://guthlabs.ai/docs/instruments/time-dilation-calculator/>)[02**Mechanism**Method and assumptions](<https://guthlabs.ai/docs/instruments/time-dilation-calculator/mechanism/>)[03**Implementation**Binding and validation](<https://guthlabs.ai/docs/instruments/time-dilation-calculator/implementation/>)[04**Qualification**Evidence and errata](<https://guthlabs.ai/docs/instruments/time-dilation-calculator/qualification/>)

## Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

**Area**: Physics — Kinematics/Projectiles/Orbits, Forces/Energy/Momentum, Rotational Dynamics, Gravitation, Oscillations/Waves, Optics, E&M Fields, Relativity, Quantum, Statistical Thermo

**Tranche**: tranche-5

**Evidence ID**: t5-212

**Ledger rows**: 1

No ledger note is attached.

## Review findings

NEEDS_REVIEW because the exact meaning of 'time difference' is ambiguous and the v unit mode is not specified as an explicit input field. With v interpreted as speed, Δt0 as proper time, Δt−Δt0 as the time difference, and |v|<c enforced, the formulas are correct. The honest-label restriction to special relativity and inertial frames is appropriate.

### Formula and scope findings

- The algebraic formulas are standard for inertial special relativity, but the output 'time difference' is undefined; this review assumes it means Δt−Δt0.

- The claim 'proper time vs dilated time for a relatively moving observer' should explicitly state that Δt0 is the proper time between the same two events and Δt is the coordinate time measured in a frame where those events occur at different locations.

### Unit assumptions

- c is the exact SI speed of light: 299792458 m/s.

- If v is supplied as a fraction of c, v=0.6 means 0.6c; if supplied in m/s, v must be converted using v/c.

- Δt0 and Δt use the same time unit; the vectors below use seconds.

- v is the nonnegative speed magnitude, not a signed velocity component.

- The formula requires |v|<c; no acceleration is included because the honest label is inertial special relativity.

## Boundary hardening

**BREAK_CLAIMED** · SELF_FLAGGED

The formula has an undefined point at exactly |v|=c and is non-real for |v|>c. A conforming calculator must explicitly reject these inputs; silently returning infinity, NaN, or a complex value would be a boundary-handling failure.

## Errata and corrections

No applied erratum is attached to this unique-name record.

## Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

````
{
  "inputs": {
    "v": 0,
    "v_unit": "fraction_of_c",
    "delta_t0": 10,
    "time_unit": "s"
  },
  "expected_outputs": {
    "gamma": 1,
    "delta_t": 10,
    "time_difference": 0
  },
  "working": "v²/c²=0²=0. γ=1/√(1−0)=1. Δt=γΔt0=1×10 s=10 s. Time difference=Δt−Δt0=10−10=0 s."
}
````

## Related workflows

No source-defined multi-instrument workflow membership is recorded.

## Sources and evidence

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

- `VERIFIED_LEDGER.json · VERIFIED_CLEAN`

- `evidence-tranche5/tranche5-results.json`

- `BOUNDARY_HAZARD_CATALOG.json`