Question
The work function of cesium metal is 2eV. It means that
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Answer
- The energy necessary to emit electrons from metal surface is 2eV
By definition the work function is the minimum energy (in electron volts) needed to remove an electron from a solid to a point immediately outside the solid surface (or energy needed to move an electron from the Fermi level into vacuum).
Hence, if the work function of cesium metal is 2ev, it means that the energy necessary to emit electrons from metal surface is 2eV.
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