In the Einstein photoelectric equation , if a graph is plotted with stopping potential on the vertical axis against frequency of incident light on the horizontal axis, what is the slope of the resulting straight line?
Answer and explanation
Correct answer: D.
- Step 1: Relate maximum kinetic energy to stopping potential: .
- Step 2: Substitute into Einstein's equation: .
- Step 3: Comparing with the slope-intercept equation of a line , the slope is .
Answer
.
Why not the others: is the slope of the vs plot, not vs ; inverts the slope; is the magnitude of the vertical intercept.
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