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Ask a room of physicists what really happens when an electron is measured and you will hear several answers, from people who all agree on the numbers. Quantum mechanics predicts experiments with astonishing precision, yet almost a century on there is still no consensus about what it says the world is made of. Perhaps there is one world and nature rolls dice. Perhaps every outcome happens. Perhaps particles ride hidden waves, or the wavefunction is nothing more than a well tuned set of expectations.

Here you will meet the strongest case for each of the leading answers, along with the objection each side finds hardest to shake, and see why a process called decoherence explains so much without closing the question. You will also learn to spot when the language of quantum physics is being borrowed to sell something, and to tell an honest open question from a claim that anything goes.

Levels

  1. 1 1. The Measurement Problem 5-question quiz
  2. 2 2. The Copenhagen Interpretation 5-question quiz
  3. 3 3. Many Worlds 5-question quiz
  4. 4 4. Pilot Waves and Hidden Positions 5-question quiz
  5. 5 5. Objective Collapse 5-question quiz
  6. 6 6. QBism and Relational Views 5-question quiz
  7. 7 7. Decoherence: What It Solves and What It Doesn't 5-question quiz
  8. 8 8. Consciousness, Mysticism and Judging Quantum Claims 5-question quiz

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