chapter 11: quantum physics

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9 Terms

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de Broglie equation

An equation relating the wavelength and the momentum of a particle: p h 

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photoelectric effect

The emission of photoelectrons from a metal surface when electromagnetic radiation above a threshold frequency is incident on the metal

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photoelectric effect equation

Einstein’s equation relating the energy of a photon

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photoelectrons

Electrons emitted from the surface of a metal by the photoelectric effect

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photon

A quantum of electromagnetic energy — photon energy E is given by E = hf

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Planck constant

Symbol h

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threshold frequency

The minimum frequency of the electromagnetic radiation that will cause the emission of an electron from the surface of a particular metal — symbol ƒ0

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wave–particle duality

A theory that states that matter has both particle and wave properties and also electromagnetic radiation has wave and particulate (photon) nature

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work function

The minimum energy needed to remove a single electron from the surface of a particular metal; symbol φ