Particles and Radiation

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Last updated 9:00 AM on 5/21/26
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4 Terms

1
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Electronvolt

The energy gained by an electron travelling through a potential difference of one volt.

1eV = 1.6 × 10^-19 J

2
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If an electron accelerates from rest, the value of electronvolts is equal to…

the kinetic energy gained by the electron.

eV = ½ mv²

3
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How do you calculate the speed of an electron from an electronvolt?

v = √2eV/m

4
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The photoelectric effect

The phenomenon in which electrons are emitted from the surface of a metal upon the absorption of electromagnetic radiation.