The Electron

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Last updated 6:19 PM on 5/18/26
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8 Terms

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Cathode Rays

Beams of electrons emitted from the cathode of a high-vacuum tube.

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Thermionic Emission

Emission of electrons from the surface of a hot metal.

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Photon

A particle-like packet of electromagnetic energy.

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Photoelectric Effect

Emission of electrons when electromagnetic radiation of a suitable frequency hits a material.

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Threshold Frequency

Minimum frequency of electromagnetic radiation required to emit an electron from the surface of a material.

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Work Function

Minimum energy required to eject an electron from the surface of a material.

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Photocell

A device that generates a current when light of a sufficient frequency falls on jt.

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X-Rays

A penetrating form of high energy electromagnetic radiation.