Match the following definitions (or descriptions) to the terms listed below them.

Answers are bolded below.

- Light shines on a metal, and electrons are emitted by the metal.
- Quantum theory
- Planck's constant
**Photoelectric effect**=====- Uncertainty principle
- Complementarity

- Describes the microworld, where light and matter exhibit both wave and particle properties.
**Quantum theory**=====- Planck's constant
- Photoelectric effect
- Uncertainty principle
- Complementarity

- The wave and particle aspects of matter and radiation are parts of a whole.
- Quantum theory
- Planck's constant
- Photoelectric effect
- Uncertainty principle
**Complementarity**=====

- We can not exactly measure both momentum and position of a particle.
There is a limit on the accuracy of the measurements.
- Quantum theory
- Planck's constant
- Photoelectric effect
**Uncertainty principle**=====- Complementarity

- The energy of a photon divided by its frequency.
- Quantum theory
**Planck's constant**=====- Photoelectric effect
- Uncertainty principle
- Complementarity

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