{
  "methodVersion": "1.0",
  "resourceRelease": "270",
  "activity": "https://darksciencedocs.com/exploration-guides/cell-to-atom/",
  "sourceReviewDate": "2026-10-25",
  "provenance": "Chosen teaching lengths and generated scale drawings; not microscopy, specimen measurements, molecular counts or quantum probability maps. Paper/reference fields are nominal 50um/5um/0.5nm; the live logarithmic slider rounds to 0.001 exponent steps.",
  "constants": {
    "micrometerM": 1e-06,
    "nanometerM": 1e-09,
    "picometerM": 1e-12,
    "inchM": 0.0254,
    "diagramWidthUnits": 360,
    "smallCutoffUnits": 1,
    "largeCutoffUnits": 720
  },
  "cases": [
    {
      "case": "A",
      "cellUm": 20,
      "mitochondrionUm": 2,
      "atomicNm": 0.1,
      "nominalFieldM": 5e-05,
      "modelFieldM": 4.9999999999999996e-05,
      "zoomLog10M": -4.301029995663981,
      "ratios": {
        "cellToMitochondrion": 10.0,
        "cellToAtomicReference": 199999.99999999994,
        "mitochondrionToAtomicReference": 19999.999999999996
      },
      "objects": [
        {
          "object": "cell",
          "lengthM": 1.9999999999999998e-05,
          "lengthInches": 0.0007874015748031496,
          "drawnWidthUnits": 144.0,
          "displayState": "visible"
        },
        {
          "object": "mitochondrion",
          "lengthM": 2e-06,
          "lengthInches": 7.874015748031496e-05,
          "drawnWidthUnits": 14.4,
          "displayState": "visible"
        },
        {
          "object": "atomic-reference",
          "lengthM": 1.0000000000000002e-10,
          "lengthInches": 3.937007874015749e-09,
          "drawnWidthUnits": 0.0007200000000000002,
          "displayState": "small"
        }
      ]
    },
    {
      "case": "B",
      "cellUm": 20,
      "mitochondrionUm": 2,
      "atomicNm": 0.1,
      "nominalFieldM": 5e-06,
      "modelFieldM": 4.9999999999999996e-06,
      "zoomLog10M": -5.301029995663981,
      "ratios": {
        "cellToMitochondrion": 10.0,
        "cellToAtomicReference": 199999.99999999994,
        "mitochondrionToAtomicReference": 19999.999999999996
      },
      "objects": [
        {
          "object": "cell",
          "lengthM": 1.9999999999999998e-05,
          "lengthInches": 0.0007874015748031496,
          "drawnWidthUnits": 1440.0,
          "displayState": "large"
        },
        {
          "object": "mitochondrion",
          "lengthM": 2e-06,
          "lengthInches": 7.874015748031496e-05,
          "drawnWidthUnits": 144.0,
          "displayState": "visible"
        },
        {
          "object": "atomic-reference",
          "lengthM": 1.0000000000000002e-10,
          "lengthInches": 3.937007874015749e-09,
          "drawnWidthUnits": 0.0072000000000000015,
          "displayState": "small"
        }
      ]
    },
    {
      "case": "C",
      "cellUm": 20,
      "mitochondrionUm": 2,
      "atomicNm": 0.1,
      "nominalFieldM": 5e-10,
      "modelFieldM": 4.999999999999999e-10,
      "zoomLog10M": -9.301029995663981,
      "ratios": {
        "cellToMitochondrion": 10.0,
        "cellToAtomicReference": 199999.99999999994,
        "mitochondrionToAtomicReference": 19999.999999999996
      },
      "objects": [
        {
          "object": "cell",
          "lengthM": 1.9999999999999998e-05,
          "lengthInches": 0.0007874015748031496,
          "drawnWidthUnits": 14400000.0,
          "displayState": "large"
        },
        {
          "object": "mitochondrion",
          "lengthM": 2e-06,
          "lengthInches": 7.874015748031496e-05,
          "drawnWidthUnits": 1440000.0000000002,
          "displayState": "large"
        },
        {
          "object": "atomic-reference",
          "lengthM": 1.0000000000000002e-10,
          "lengthInches": 3.937007874015749e-09,
          "drawnWidthUnits": 72.00000000000003,
          "displayState": "visible"
        }
      ]
    },
    {
      "case": "D",
      "cellUm": 40,
      "mitochondrionUm": 2,
      "atomicNm": 0.1,
      "nominalFieldM": 5e-05,
      "modelFieldM": 4.9999999999999996e-05,
      "zoomLog10M": -4.301029995663981,
      "ratios": {
        "cellToMitochondrion": 20.0,
        "cellToAtomicReference": 399999.9999999999,
        "mitochondrionToAtomicReference": 19999.999999999996
      },
      "objects": [
        {
          "object": "cell",
          "lengthM": 3.9999999999999996e-05,
          "lengthInches": 0.0015748031496062992,
          "drawnWidthUnits": 288.0,
          "displayState": "visible"
        },
        {
          "object": "mitochondrion",
          "lengthM": 2e-06,
          "lengthInches": 7.874015748031496e-05,
          "drawnWidthUnits": 14.4,
          "displayState": "visible"
        },
        {
          "object": "atomic-reference",
          "lengthM": 1.0000000000000002e-10,
          "lengthInches": 3.937007874015749e-09,
          "drawnWidthUnits": 0.0007200000000000002,
          "displayState": "small"
        }
      ]
    }
  ],
  "comparisons": {
    "cell20UmInNm": 20000,
    "cellToAtomicReference": 200000,
    "fieldAtoBReduction": 10,
    "drawnWidthAtoBIncrease": 10,
    "caseDCellToMitochondrion": 20,
    "caseDCellToAtomicReference": 400000
  },
  "checks": {
    "referenceSha256": "76c6a7094070baf8f4229f6247278f88684b6a006a216c27fa558bb116fdf793",
    "generatedCasesSha256": "e24cce0e5ee395487a94a253d7e6812477659c63737a353c890d3418c72e6f66",
    "lengthsInchesRatiosZoomAndDisplayStatesAgree": true
  },
  "limits": "Chosen cell diameter, mitochondrial length and atomic characteristic extent are illustrative, not universal sizes. Ratios compare one linear dimension only, not counts or volume occupancy. Shapes/colors/internal folds are artistic. Atomic extent has no hard edge and glow has no measured probability meaning. Display thresholds are UI rules, not optical or electron-microscope resolution. Zoom does not change physical sizes; editing a dimension changes the adopted model. No independent scientific review or formal curriculum alignment claimed."
}