Photoelectric Graph Interpretation

Question

Slope of plot of stopping potential vs frequency (above threshold) gives?

RankGuru · Accepted Answer

1. **Linear Equation**: From $e V_0 = hf - \phi$.
2. **Standard Form ($y = mx + c$)**: Divide by $e$:
   - $V_0 = \left( \frac{h}{e} \right) f - \frac{\phi}{e}$
3. **Identify Slope**: The slope of the $V_0$ vs $f$ graph is the coefficients of $f$, which is **$h/e$**.
4. **Intercepts**: The x-intercept gives the threshold frequency ($f_0$), and the magnitude of the y-intercept gives $\phi/e$.
5. **Note**: This slope is universal for all metals, as $h$ and $e$ are fundamental constants.

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Photoelectric Graph Interpretation

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