Quantum Mechanics quiz

More questions about Quantum Mechanics

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   How is hydrogen's lowest-energy electron cloud shaped?

   Answer: Spherical

   Why: The electron's most likely distance from the nucleus is about 0.053 nanometers, a length called the Bohr radius.

2. 2 Medium

   Which medical scan uses the spin of hydrogen nuclei?

   Answer: MRI

   Why: A strong magnet lines up the hydrogen spins, a radio pulse tips them over, and the faint radio signals they send while settling back build the image.

3. 3 Hard

   What does squaring a wave function's magnitude give?

   Answer: Probability

   Why: This Born rule, proposed in 1926, turns the wave into the odds of finding the particle at each spot when you look.

4. 4 Easy

   What can't anyone predict about a single radioactive atom?

   Answer: Its moment of decay

   Why: Every atom of an isotope has the same fixed chance of decaying each second, so a big sample halves on a reliable schedule.

5. 5 Medium

   What sets the color of light a quantum dot gives off?

   Answer: Its size

   Why: A smaller dot squeezes its electrons harder and raises their energy, so tiny dots glow blue while bigger ones of the same stuff glow red.

6. 6 Hard

   Which idea did experiments testing Bell's theorem rule out?

   Answer: Local hidden variables

   Why: Preset hidden answers would cap how strongly paired particles can agree, and experiments with entangled photons beat that cap.