- Feel free to use the questions below to check (or improve) your understanding of the concepts in this physics module.

- A photon's energy is given by its frequency multipled by ___ constant
- Henry's
- Jame's
- Newton's
- Einstein's
**Planck's**- phonton's
- energy

- The following entites are all moving at the same speed. Based on quantum physics, which of these entities has the shortest wavelength?
- an elephant
- a space-ship
- an astronaut
- a mouse
- an insect
**the earth**- an electron
- a proton

- In the Bohr model, electrons can orbit the nucleus of an atom in a set of discrete rings. The perimeter of each ring corresponds to an integral number of ___ of the electron.
- de Broglie spins
- de Broglie rotations
- de Broglie frequencies
**de Broglie wavelengths**- de Broglie flavors
- de Broglie amplitudes

- Alpha particles contain
**protons**- electrons
- neutrons
- alphons
- particlons
- positrons
- gamma rays

- The Bohr model of the atom has ___ circling the atomic nucleus.
- protons
**electrons**- neutrons
- alphons
- particlons
- positrons
- gamma rays

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