{
  "schema": "physics-anim-scene",
  "version": 1,
  "pixelsPerMeter": 1000,
  "gravityAcceleration": 9.8,
  "coulombK": 8987551792.3,
  "timeScale": 1,
  "view": {
    "x": 30,
    "y": 25,
    "scale": 0.82
  },
  "canvasBackground": {
    "mode": "coordinate",
    "origin": {
      "x": 540,
      "y": 355
    }
  },
  "entities": [
    {
      "id": 1,
      "type": "RichTextEditor",
      "state": {
        "pos": {
          "x": 540,
          "y": 62
        },
        "locked": true,
        "width": 1000,
        "height": 104,
        "text": "**探究凸透镜成像规律**\n\n焦距 f = 10 cm　｜　物高 4 cm　｜　初始物距 u = 30 cm",
        "fontSize": 18,
        "fontWeight": 400,
        "lineHeight": 1.5,
        "padding": 16,
        "backgroundColor": "#ffffff",
        "backgroundOpacity": 0.96,
        "textColor": "#17324d",
        "borderColor": "#2563eb",
        "borderWidth": 1,
        "cornerRadius": 8,
        "showBorder": true
      }
    },
    {
      "id": 2,
      "type": "RichTextEditor",
      "state": {
        "pos": {
          "x": 540,
          "y": 739
        },
        "locked": true,
        "width": 1000,
        "height": 116,
        "text": "**测量任务**\n固定透镜，将物体依次放在距透镜 30、20、15、8 cm 处。移动光屏寻找像，记录像距、正倒和大小。",
        "fontSize": 16,
        "fontWeight": 400,
        "lineHeight": 1.5,
        "padding": 16,
        "backgroundColor": "#ffffff",
        "backgroundOpacity": 0.96,
        "textColor": "#17324d",
        "borderColor": "#ccdbe8",
        "borderWidth": 1,
        "cornerRadius": 8,
        "showBorder": true
      }
    },
    {
      "id": 3,
      "type": "Ruler",
      "state": {
        "pos": {
          "x": 540,
          "y": 552
        },
        "locked": true,
        "length": 920,
        "thickness": 38,
        "unit": "cm",
        "minorStep": 1,
        "majorEvery": 5,
        "showMeasure": false,
        "showEntityMarkers": false,
        "fillColor": "#eef5ff",
        "strokeColor": "#2563eb"
      }
    },
    {
      "id": 4,
      "type": "OpticalObject",
      "state": {
        "pos": {
          "x": 240,
          "y": 355
        },
        "locked": false,
        "heightPx": 40,
        "color": "#243c54",
        "rayColor": "#087e8b",
        "showRays": true,
        "raysMode": "principal",
        "strictCompoundImaging": true,
        "showAllLensImages": false
      }
    },
    {
      "id": 5,
      "type": "ConvexLens",
      "state": {
        "pos": {
          "x": 540,
          "y": 355
        },
        "locked": false,
        "angleDeg": 90,
        "length": 270,
        "focalLengthPx": 100,
        "thickness": 14,
        "dispersion": 0,
        "showAxis": true,
        "showCenter": true,
        "showF": true,
        "show2F": true
      }
    },
    {
      "id": 6,
      "type": "OpticalScreen",
      "state": {
        "pos": {
          "x": 690,
          "y": 355
        },
        "locked": false,
        "length": 240,
        "angleDeg": 90,
        "color": "#17324d",
        "showHits": true,
        "hitRadius": 4,
        "blocksRays": true
      }
    },
    {
      "id": 7,
      "type": "RichTextEditor",
      "state": {
        "pos": {
          "x": 215,
          "y": 198
        },
        "locked": true,
        "width": 225,
        "height": 75,
        "text": "**物体**\n沿主光轴移动",
        "fontSize": 17,
        "fontWeight": 400,
        "lineHeight": 1.5,
        "padding": 16,
        "backgroundColor": "#ffffff",
        "backgroundOpacity": 0,
        "textColor": "#17324d",
        "borderColor": "#ccdbe8",
        "borderWidth": 1,
        "cornerRadius": 8,
        "showBorder": false
      }
    },
    {
      "id": 8,
      "type": "RichTextEditor",
      "state": {
        "pos": {
          "x": 850,
          "y": 205
        },
        "locked": true,
        "width": 240,
        "height": 75,
        "text": "**光屏**\n寻找清晰的实像",
        "fontSize": 17,
        "fontWeight": 400,
        "lineHeight": 1.5,
        "padding": 16,
        "backgroundColor": "#ffffff",
        "backgroundOpacity": 0,
        "textColor": "#17324d",
        "borderColor": "#ccdbe8",
        "borderWidth": 1,
        "cornerRadius": 8,
        "showBorder": false
      }
    },
    {
      "id": 9,
      "type": "RichTextEditor",
      "state": {
        "pos": {
          "x": 540,
          "y": 625
        },
        "locked": true,
        "width": 890,
        "height": 70,
        "text": "**坐标背景下**　透镜光心为原点，主光轴 y = 0\n物体 x：−0.30 / −0.20 / −0.15 / −0.08 m；保持 y = 0。",
        "fontSize": 16,
        "fontWeight": 400,
        "lineHeight": 1.5,
        "padding": 16,
        "backgroundColor": "#ffffff",
        "backgroundOpacity": 0.96,
        "textColor": "#17324d",
        "borderColor": "#ccdbe8",
        "borderWidth": 1,
        "cornerRadius": 8,
        "showBorder": true,
        "textAlign": "center"
      }
    }
  ]
}