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Homework Statement
In my attachment, the x intercept gives threshold frequency and the y intercept gives the work function.
Homework Equations
The Attempt at a Solution
Work function is the minimum energy needed to pull out an electron from the metal surface. My question is, from the graph, work function is a negative value. Will work function takes negative values?
Homework Statement
Homework Equations
The Attempt at a Solution
Attachments

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