{
  "question": "When a diver points a flashlight upward toward the surface of the water at an angle 20° from the normal, the beam of light",
  "options": {
    "A": "totally internally reflects",
    "B": "passes into the air above",
    "C": "is absorbed",
    "D": "None of these"
  },
  "answer": "B",
  "topk_tokens": [
    "Snell's Law",
    "Total Internal Reflection",
    "Critical Angle"
  ],
  "uncertainties": [
    null,
    null,
    null
  ],
  "raw_output": "{\"concepts\": [\"Snell's Law\", \"Total Internal Reflection\", \"Critical Angle\"]}"
}