Photoelectric Threshold Frequency

Question

Threshold frequency f0 relates to work function φ by?

RankGuru · Accepted Answer

1. **Definition of Work Function ($\phi$)**: The minimum energy required to eject an electron from the metal surface.
2. **Threshold Frequency ($f_0$)**: The minimum frequency of incident light below which no photoelectrons are emitted, regardless of intensity.
3. **Relationship**: At the threshold condition, the entire energy of the incident photon ($E = hf_0$) is used just to overcome the work function, with no kinetic energy left for the electron.
4. **Equation**: $\phi = h f_0$.
5. **Note**: If incident frequency $f < f_0$, no emission occurs.

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Photoelectric Threshold Frequency

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